GUNDISSALINUS AND THE APPLICATION OF AL-FĀRĀBĪ’S METAPHYSICAL PROGRAMME

This study deals with Dominicus Gundissalinus’s discussion on metaphysics as philosophical discipline. Gundissalinus’s translation and re-elaboration of al-Fārābī’s Iḥṣā’ al-ʿulūm furnish him, in the De scientiis, a specific and detailed procedure for metaphysical analysis articulated in two different stages, an ascending and a descending one. This very same procedure is presented by Gundissalinus also in his De divisione philosophiae, where the increased number of sources –in particular, Avicenna– does not prevent Gundissalinus to quote the entire passage on the methods of metaphysical science from the Iḥṣā’ al-ʿulūm, with some slight changes in his Latin translation. The analytical procedure herein proposed becomes an effective ‘metaphysical programme’ with regards to Gundissalinus’s ontocosmological writing, the De processione mundi. The comparative analysis of this treatise with the procedure received by al-Fārābī shows Gundissalinus’s effort to follow and apply this metaphysical programme to his own reflection, in a whole different context from al-Fārābī’s and presenting doctrines quite opposed to the theoretical ground on which al-Fārābī’s epistemology is based, like ibn Gabirol’s universal hylomorphism. Nevertheless, thanks to the application of the ‘metaphysical programme’, one can effectively claim that Gundissalinus’s metaphysics is, at least in the author’s intentions, a well-defined metaphysical system. In appendix to this article the three Latin versions of al-Fārābī’s discussion on metaphysics are reported, e.g., Gundissalinus’s quotations in De scientiis and De divisione philosophiae, and Gerard of Cremona’s translation in his De scientiis.

must be pursued, e.g., the metaphysical programme.The last part of this contribution will focus on Gundissalinus's application of this programme, as seen in De processione mundi.

Gundissalinus's New Organization of Scientific Knowledge
Gundissalinus' five treatises, written during his Toledan years, share many similarities regarding both style-textual collections of a number of quotations and excerpts from Arabic, Hebrew, and Latin authors, never quoted by nameand the philosophical tradition on which they are based-Arabic and Hebrew Neoplatonism, as expressed by Avicenna or Ibn Gabirol.Gundissalinus covers three main philosophical themes in his production: psychology (De anima), epistemology (De scientiis and De divisione philosophiae), and metaphysics (De qualities of the soul, in which Gundissalinus notably claims the soul is composed of matter and form. 11Contrarily, the second part of the De anima is an examination of the mental faculties, 12 and this treatment is strongly dependent on Avicenna's theory of senses and intellect. 13ndissalinus's metaphysical reflection is presented in two writings, the De unitate et uno 14 and the De processione mundi. 15The former is a short work on the ontological value of metaphysical unity, 16 while the latter is an elaborate and dense discussion of cosmology and ontology that problematizes the position previously expressed in the De unitate.The metaphysics presented in the De 663-677; Alexander Fidora, 'La metodología de las ciencias según Boecio: su recepción en las obras y traducciones de Domingo Gundisalvo', Revista Española de Filosofía Medieval 7 (2000), pp.127-136; and Nicola Polloni, 'Il De processione mundi di Gundissalinus: prospettive per un'analisi genetico-dottrinale', Annali di Studi Umanistici 1 (2013), pp.25-38.10   Gundissalinus, De anima (ed.Alonso del Real and Soto Bruna), pp.68,1-82,22.11 Ibid., pp.102,18-103,3: «Restat igitur ut sit substantia quae est spiritus rationalis.De quo si constiterit quod sit compositus ex matera et forma, tunc non erunt nisi tres substantiae, scilicet materia et forma et compositum ex utroque, ut substantiae talis recte fiat divisio.Substantia, alia est simplex, alia composita; simplex, alia materia, alia forma; sed composita, alia est corpus, alia est spiritus.Cui enim advenit forma corporeitatis et fit substantia corporea, eidem procul dubio advenit forma spiritualitatis et rationalitatis et fit substantia rationalis spiritualis».12 Ibid., pp.178,1-318,13.13 See Herbert A. Davidson, Alfarabi, Avicenna, and Averroes on Intellect: Their Cosmologies, Theories of the Active Intellect, and Theories of Human Intellect, Oxford -New York: Oxford University Press, 1992; Luís X. López-Farjeat and Jörg A. Tellkamp (eds.),Philosophical Psychology in Arabic Thought and the Latin Aristotelianism of the 13th Century, Paris: Sic et non, 2013.It has to be noted that Gundissalinus's De anima is the first Latin writing in receiving the doctrine of separated active intellect.
processione is extremely out of character for Gundissalinus.In this treatise, the author receives and melds together doctrines and positions, derived from both Arabic and Latin writings, which are often very divergent, if not directly opposing each other. 17Using these speculative materials, Gundissalinus builds a mature and original theoretical system, the keystone of which is the union of the theory of universal hylomorphism with the doctrine of necessary and possible being.
The third theme covered by Gundissalinus's reflection is the theory of knowledge.The Toledan philosopher dedicates two treatises to the discussion of this topic, the De scientiis 18 and the De divisione philosophiae. 19The De scientiis is deeply indebted to its main source text, al-Fārābī's Kitāb Iḥṣā' al-ʿulūm; 20 the textual relationship between these two writings is so strong that one could consider the De scientiis a translation of al-Fārābī's text. 21Nevertheless, Gundissalinus makes some important modifications in regards to the original Arabic text, as M. Alonso Alonso 22 and J. Jolivet23 have shown, constituting a certain degree of originality.
Notwithstanding the peculiar textual and stylistic nature of this treatise, the division of sciences presented in the De scientiis and the De divisione philosophiae is similar, though the latter shows a greater problematization of the features 21 This is the perspective adopted by N. Kinoshita, who refuses to ascribe the De scientiis to Gundissalinus's philosophical production (accepting, instead, the De immortalitate animae).Cf.Noboru Kinoshita, El pensamiento filosófico de Domingo Gundisalvo, Salamanca: Universidad Pontificia de Salamanca, 1988, at pp. 47-90.
exposed and a higher degree of complexity, both in relation to the theoretical contents and the sources used.The Latin background from which the Toledan philosopher develops his speculation is crucial; Gundissalinus builds his scientific organization upon features derived from the Chartrean masters, William of Conches 24 and Thierry of Chartres, 25 and the more traditional Boethius 26 and Isidore of Seville, 27 selecting passages and statements that could be included in his gnoseological schematization.
In the De scientiis, the overall gnoseology on which Gundissalinus's discussion is based is derived from Arabic philosophy.H. Hugonnard-Roche 28 has shown how deep is Gundissalinus' indebtedness to al-Fārābī, Avicenna, and al-Ghazālī.From their texts Gundissalinus develops an organization of sciences that originates from the Alexandrian curricula studiorum.Avicenna's presence and influence in this treatise is even deeper than al-Fārābī's, testified by the large quotation at the end of the treatise, taken from a long Avicennian excerpt called the Summa Avicennae de convenientia et differentia subiectorum. 29This quotation is fundamental to Gundissalinus's exposition of the epistemological core of his scientific organization, e.g., the theory of subordination of sciences regarding their subject. 30Aside from these three Arabic sources, Gundissalinus also uses the works of Isaac Israeli (Liber de definitionibus), al-Kindi (Liber de quinque essentiis) and the Ikhwan aṣ-Ṣafa' (Liber introductorius in artem logicae demonstrationis. 31) Notwithstanding the large number of Arabic sources, one should highlight the fundamental value Latin speculation has for Gundissalinus.As Fidora 32 has shown, Latin philosophy, particularly that of Boethius, plays the role of 'hermeneutical condition' for Gundissalinus's elaboration of his theory of knowledge.
The divisio scientiarum illustrated in the two treatises is quite similar, if not completely consistent.In the De scientiis, Gundissalinus exhibits a scientific organization very close to al-Fārābī's Iḥṣā' al-ʿulūm. 33The treatise is composed of five chapters and a prologue.Each chapter analyses a different discipline, beginning with the scientia linguae, e.g., grammar, composed of seven parts, 34 and the logic, subdivided into eight parts. 35Grammar and logic are different, since the former always refers to a spoken language, while the latter has a universal value expressed through three intentions: exterior cum voce, fixa in anima, and virtus creata in homine. 36Unlike in the De divisione, Gundissalinus affirms the instrumental character of logic in the De scientiis; its value is for checking the validity of philosophical arguments, without itself being a part of philosophy.
The schematization of scientific disciplines presented in the De scientiis is restated and expanded upon in the De divisione philosophiae.The scientific organization exposed herein was widely popular during the Middle Ages, as it presents two fundamental innovations.In fact, as Jolivet 44 has noted, this new theory of knowledge introduces sciences that were previously unknown or whose epistemological status was uncertain and provides a justification of logic as part of philosophy.With these additions and the adherence of this new system to the upcoming Aristotelian corpus, Gundissalinus's theory of knowledge would become the general structuration of scholastic knowledge. 45e De divisione is comprised of two parts: a large prologue where Gundissalinus exposes the principles of his divisio, and a specific treatment of the different sciences, their species and their parts.The point of departure is the distinction between divine and human science, and the articulation of the latter in the sciences of eloquence and wisdom. 46Only wisdom corresponds to philosophy, since philosophy 47  truth and love of goodness.Philosophy itself is divided into theoretical and practical philosophy, both of which show a threefold articulation, parallel to that exposed in the De scientiis.While practical philosophy is always bound to human action, the context of theoretical philosophy is always speculative and intellective. 48 previously stated, these two parts of philosophy are proposed hierarchically following Avicenna's theory of subalternatio through the different ontological value of the subject studied by each discipline.In this way, Gundissalinus describes the three sciences composing theoretical philosophy through a discussion of the materiality and mobility of their subject by combining the doctrines of Avicenna, 49 al-Ghazālī, 50 and Boethius. 51In this system, scientia physica deals with mobile objects found in matter, which are studied in terms of their movement and in their matter, while scientia mathematica deals with mobile objects found in matter, studied without their movement and their materiality.Finally, scientia metaphysica 52 deals with objects without movement or matter and studied without any reference to movement and matter.
A similar articulation is proposed for practical philosophy, comprised of scientia politica, scientia oeconomica, and scientia moralis. 53The entire wisdom of philosophy is concretized in these six disciplines, 54 and their purpose is the achievement of the perfection of the soul and, thereby, future beatitude.
The second part of the text describes each science through the examination of its subject, utility, and dependence on the overall articulation of knowledge.First, 48 Gundissalinus Gundissalinus deals with the theoretical sciences, 55 then passing to the sciences of eloquence 56 (grammar, poetics, and rhetoric), logic 57 -doubling as a part of philosophy and instrumentum-, 58 and certain natural sciences (mainly medicine. 59) Next, Gundissalinus examines the mathematical disciplines, 60 mirroring what he previously stated in the De scientiis.Finally, the Toledan philosopher introduces the large quotation of Avicenna's Summa Avicennae de convenientia et differentia subiectorum, after which the treatise ends with a short examination of practical philosophy. 61llowing N. Kinoshita, 62

III. Moralis
This schema foregrounds Gundissalinus' great development of the articulation of science.The new systematization of scientific knowledge includes many disciplines that were previously absent from the traditional division on trivium and quadrivium and will will be widely spread throughout Europe during the Middle Ages.

A 'New' Metaphysical Programme
As A. Fidora 63 has noted, Gundissalinus is the first Latin philosopher to use the term metaphysica for the discipline dealing with the principles of being, rather than as merely a reference to the Aristotelian work.As I have mentioned before, metaphysics or divine science is the third and highest part of theoretical sciences in both of his epistemological treatises.
The De scientiis states that scientia divina is divided into three parts.The first deals with essences and their accidents, through the consideration of their being, 64 while the second is focused on the demonstration and verification of the 63 See Fidora, 'Dominicus Gundissalinus and the Introduction of Metaphysics into the Latin West', op.cit.. 64 Gundissalinus, De scientiis (ed.Alonso Alonso), p. 127,6-8 : «Scientia divina dividitur in tres partes: quarum prima inquirit de essentiis et de rebus que accidunt eis, secundum hoc quod sunt essentiae».
principles used by physics and mathematics, rejecting the errors concerning them. 65The final part of divine science 66 deals with beings which are neither bodies nor can be detected in bodies (e.g., accidents), and the study pursued by this discipline is described in detail, beginning with the description of the essences themselves: 'De quibus in primis inquirit, an sint essentie, an non.Et demonstratione probat quod sunt essentie.Deinde inquirit de eis, an sint plures, an non.Et demonstrat quod sunt plures.Postea inquirit an sint finitae, an non.Et demonstrat quod sunt finitae.Deinde inquirit an ordines earum in perfectione earum sint aequales, an inaequales.Et demonstrat quod inaequales.Deinde probat quod ipsae secundum suam multitudinem surgunt de minore ad perfectiorem et ad perfectiorem, quousque perveniunt ad postremum perfectum, quo perfectius nihil esse potest, nec in esse potest ei aliquod esse simile, nec equale, nec contrarium, usquequo pervenitur ad primum, quo nihil potest esse prius, et ad praecedens quo nihil potest esse magis praecedens, et ad esse quod impossibile est adquiri ab alia re; et quod illud esse est unum absolute, praecedens et primum'. 67e first assertion proven by metaphysics is the existence of the essences.Once their existence is demonstrated, the survey must show that there exist many essences many and that those essences are not equal regarding their ontological value.This assertion stems from a minor or major perfections of these principles of being, that is, a hierarchical order from the first principle, which is completely perfect, absolutely one and the first cause of everything.Ascending the hierarchy of essences, the metaphysical analysis arrives at the pure One that causes the existence of every following being.This first ascending stage of the survey is followed by the examination of the first principle itself: esse multitudinem; immo illud est quod supra omnia dignius est nomine et significatione unius et entis et veri et primi.-Deinde ostendit quod illud tantum quod est istarum proprietatum, debet credi quod sit Deus, cuius gloria sublimis'. 68ter having climbed from the caused essences to the first Cause, divine science, Gundissalinus must demonstrate that the first and absolute being is the ontogonic cause of every subsequent being and every derived unity that proceeds from his pure Unity.At the same time, his trueness is the source of every truth, and any kind of multiplicity is absent from his simple being, since he is true and first Being and One.The analysis must show that these properties can be properly said only of him, and it must be believed that the first Cause is God himself.
The last stage of Gundissalinus' programme is a descending analysis that proceeds from God back to the essences and then toward a further analysis of creatural ontology, in light of the knowledge of the first principle: 'Postea docet qualiter essentiae proveniunt ab eo, et qualiter adeptae sunt esse ab eo.Deinde inquirit de ordinibus essentiarum, et qualiter adveniunt eis illi ordines, et quomodo meretur unaqueque esse in eo ordine in quo est, et declarat qualis est connexio illorum ad se invicem, et quibus rebus fit illa connexio.Deinde progreditur ad comprehendendas reliquas operationes Dei in essentiis, quousque compleat omnes eas.
Ostendit etiam quod in nulla earum est defectus neque discordia, neque malitia ordinis sive compositionis, nec diminutio, nec superfluitas.Postea destruit errores quorumdam de Deo et de operibus eius opinatium superfluitatem et diminutionem in eo et in operibus eius et in essentiis quas creavit'. 69vine science must deal with the genesis of essences, their order and derivation, as well as their mutual connection.In other words, the demonstration of God's existence and attributes must be followed by the analysis of the instauration of the world, a cosmogenesis whose knowledge can be assured only by the precedent ratio regarding its origin.God acts in the essences, causing their actual being, as perfect and harmonic existence as one can recognise in the world.The final part of the survey is ultimately focused on the rejection of possible errors regarding God's causation and ontological instauration.This twofold procedure, composed of a first ascending moment and a second descending stage, is clearly indebted to al-Fārābī's reception of Aristotle's treatment in Posterior Analytics.This method was familiar to Gundissalinus, 70 thanks to Calcidius' 71 and Thierry of Chartres's use of compositio and resolutio. 72e discussion of metaphysical science undergoes a substantial development in the De divisione philosophiae.Gundissalinus's treatment herein is articulated by the aforementioned didactic method derived from Neoplatonic accessi and didaskaliká, and it is therefore characterised by a progressive discussion of what divine science is, what its genera, subject, parts, species, officium and purpose are, and what its instrument, artifex, name, order, and utility are. 73 I have previously mentioned, in the prologue Gundissalinus states that divine science deals with those beings that lack matter and movement, regarding both the ontological and gnoseological considerations. 74Following Avicenna, 75 Gundissalinus clarifies that this discipline is called scientia divina, philosophia prima, metaphysica, and causa causarum, regarding the manifold aspects with which it deals. 76The Toledan philosopher also exposes three converging 70 Gundissalinus uses the speculative method of compositio/resolutio at length in his De processione mundi.For example, cf.Gundissalinus, De processione mundi (ed.Bülow), p. 4,8-10; pp.24,20-25,2; and p. 50,10-13.definitions of metaphysics, as 'scientia de rebus separatis a materia definitione', 77 'philosophia certissima et prima', 78 and 'sapientia certissima'. 79By this, metaphysics corresponds to sapientia, as they are both are the noblest sciences for the certitude of their truths, dealing with the highest things to be known, e.g., God and his causality. 80taphysics certifies the principles of the other sciences 81 -an epistemological relevance which corresponds to what Gundissalinus has already stated in the De scientiis -through demonstration as its main theoretical instrument. 82Its materia is constituted by the four Aristotelian causes, 83 and since metaphysics is the highest science that must make the principles of the subsequent sciences certain, it must deal with what is most evident and common, e.g., being. 84At the same time, since Posterior Analytics clearly states that a science cannot inquire into what its own matter is, God and the causes cannot be considered as the subject of metaphysics, for metaphysics is an inquiry on the first principle and His causation. 85Thus, divine science examines the first natural and mathematical causes of being and therefore the causa causarum and principium principiorum of existence, or, God. 86ndissalinus distinguishes four different aspects of the parts in which metaphysics is composed: 1) beings that are completely devoid of matter; 2) beings that are mingled with matter due to a preceding and constituting cause, but whose matter is not an essential constituent; 3) aspects that are common to 77 Ibid material and immaterial beings, as causality and unity; and finally 4) aspects that are proper of material beings, like movement and rest. 87This fourfold distinction is accompanied by a division into species, whose number is not specified by Gundissalinus.These species are compared to the peculiarities of the examination of esse in quantum esse, like substance and accident, universality and particularity, cause and effect, act and potency. 88e longest part of Gundissalinus's treatment of metaphysica in the De divisione philosophiae is centred on the ordo through which this science develops its inquiry. 89Within the order of theoretical sciences, metaphysics follows physics and mathematics, and uses their results in order to pursue its own research. 90egarding the progression of metaphysics itself, Gundissalinus presents a large quotation, with some discrepancies and modifications, of his De scientiis (see Appendix), derived from al-Fārābī's Iḥṣā' al-ʿulūm.
Metaphysics first deals with the essences and their ontological correlates and then analyses the principles of demonstration proper of the other theoretical sciences and logic, removing the errors made by the antiqui. 91 Ibid., p. 39,15-24: «Hoc autem ordine ipsa tractatur: In primis inquirit de essentiis et de rebus, quae accidunt eis secundum hoc, quod sunt essentiae.Deinde inquirit de principiis demonstrationum in scientiis speculationis vel partibus specialibus.Deinde inquirit de principiis scientiae logicae et principiis scientiae doctrinalis et principiis scientiae naturalis; et inquirit iustificationem eorum et substantias et proprietates eorum et destruit errores that, while in the De scientiis these two aspects of metaphysical science were partes, in De divisione they are considered first stages of the scientia divina.Nevertheless, the continuation of the discussion regarding the third stage of metaphysical research mirrors the passage in the De scientiis.The slight changes detected when comparing the two versions are most likely due to Gundissalinus's wish to polish and quote from the translated text, which is characteristic of the author.Moreover, the comparison of these texts with Gerard of Cremona's translation of al-Fārābī's Iḥṣā' al-ʿulūm (see Appendix), highlights the peculiarities of Gundissalinus's operation.Gerard's version is indeed more literal and, in light of the deeper connection to the original Farabian text, the discussion is longer than in Gundissalinus's treatises.
Coming back to the textual analysis, the De divisione presents the same ordo in metaphysical analysis we have already seen.Metaphysics must deal with those essences that are neither bodies nor in bodies, demonstrating that these are essences, plural in number, but not infinite.Finally the inquiry states that the essences are different from each other regarding their own perfection. 92From the recognition of the differences concerning the ontological status of the essences, one must admit they all are hierarchically ordered, and through this order, one arrives to the first Being that precedes everything.Thus, metaphysics demonstrates that everything caused by this First cause receives its being, unity, and truth from what is absolute Being, One, and Trueness and analyses the ways by which the caused beings come to be.Finally, divine science states that there is no multiplicity in the One and examines the attributes of the first Cause that must be believed to be God. 93Once all of this is achieved, the inquiry descends back to the caused beings: Again mirroring De scientiis's treatment, the descending phase of metaphysical speculation is developed as a cosmological analysis of the world's instauration.Divine science inquires into the proceeding of essences from God, their causal order and their mutual connection regarding this order, and God's operations on the essences.After, metaphysics deals with the demonstration of the completeness of God's instauration of the world, showing that there is no lack or superfluity in divine action and eventually destroys the errors regarding God and his ontogonic and cosmological causation.Thus, in the De divisione, Gundissalinus accepts and uses al-Fārābī's Kitab Iḥṣā' al-ʿulūm for his description of the metaphysical procedure, translated and readapted into the De scientiis.One should consider that the discussion of the order of the inquiry pursued by divine science shows the traits of a specific metaphysical programme, characterized by a twofold ascending/descending method.This metaphysical programme can be summarized as follows: Ascending part: 1) analysis of the caused essences, their ontological characteristics, and accidents; 2) verification of the principles of the subsequent theoretical sciences (physics and mathematics) and logic, rejecting any possible error; 3) analysis of those essences that are not bodies or that do not exist in a body (accidents), demonstrating: veritatem -et quomodo conferat illud; et quod impossibile est aliquo modo in eo esse multitudinem, immo illud est, quod supra omnia dignius est nomine et significatione unius et entis et veri et primi.Deinde ostendit, quod illud tantum, quod est istarum proprietatum, debet credi, quod sit Deus, cuius gloria sublimis».b) whether they are many or not, stating that they are many; c) whether they are finite or infinite: demonstrating that they are finite; d) whether they are equal or not in existence, the answer to which is that the essences have a different ontological status; e) that from the analysis of order of the essences one arrives at the first Cause of the essences; 4) analysis of the first Cause, demonstrating that: a) it is the absolute One, Being, and Trueness, that causes the existence, unity, and truth of every subsequent being; b) the One has no multiplicity, definition, or similarity to other beings; c) the first Cause is God.

Descending part:
1) examination of the essences in regards to their causation by God; 2) analysis of the order and the mutual relations among essences; 3) the question regarding God's further operations on the essences, e.g., divine causation besides ontogony; 4) demonstration of the completeness of the world's instauration and order; 5) refutation of errors regarding God and his operations.This procedure is defined by detailed passages that actually mirror the metaphysical discussion proposed by al-Fārābī in his metaphysical works.Nevertheless, one should note that Gundissalinus only had access to a very limited part of al-Fārābī's philosophical production, since in addition to the 'translation' of the De scientiis, he only translated the following works into Latin: De intellectu et intellecto, Expositio libri quinti Elementorum Euclidis, Fontes quaestionum, and the Liber exercitationis ad viam felicitatis.It seems quite clear then, that Gundissalinus accepts al-Fārābīs's metaphysical programme as intrinsically valid by an epistemological point of view and thus, potentially applicable to metaphysical speculation in general.

An Application of al-Fārābī's Metaphysical Programme?
In the De processione mundi, Dominicus Gundissalinus deals with the fundamental problems of ontology and cosmology, proposing his own original solutions.This writing is quite different from the De unitate et uno, for the latter is characterised by its very concise treatment of just one main metaphysical feature: unity as an ontological primary concept.
The De processione begins by stating the purpose of the examination with which Gundissalinus is dealing: 'Invisibilia dei per ea, quae facta sunt, a creatura mundi intellecta conspiciuntur.Si enim vigilanter haec visibilia conspicimus, per ipsa eadem ad invisibilia dei contemplanda conscendimus'. 95The metaphysical analysis cannot simply assume the existence of God, but must deal exhaustively with the attributes of his existence through the examination of its effects, that is, the study of the composition and the disposition of created things as they are caused by God.The analysis of this causative process is based on three speculative powers of the human mind: ratio, demonstratio, and intelligentia.These powers are the intellectual modalities of the inquiries into physics, mathematics, and theology (e.g., metaphysics), respectively and are hierarchically ordered and specular to these theoretical disciplines. 96ter exposing an a posteriori justification of his examination and the epistemological basis on which the latter is grounded, Gundissalinus presents four demonstrations for the existence of a first cause.The first is based on the opposition between heavy and light elements, specifically on their tendency to move toward their natural place.Since the sublunary world is constituted of heavy and light elements, it is necessary to admit a cause composing their contrariety. 97The second proof deals with the hylomorphic composition of bodies.Matter and form have opposing properties and cannot be joined without an external cause that composes their opposition.For this reason, and considering the ontological composition of bodies, one must admit the existence of a first composing cause.The third and the fourth proofs of the existence of the first cause are both cosmological demonstrations.The former examines the corporeal being as subject to degeneration and corruption, stating that everything that begins to be cannot be the cause of its own being.However, an external cause of its existence is necessary, and that is the first cause. 99Even so, every movement is the actualization of a previous potency realized by something already actualized, that is, its mover.However, since an infinite regress is not admissible, one must admit the existence of a first and eternal mover, e.g., an efficient cause of every being. 100ce he has demonstrated the existence of the first cause through these four proofs, Gundissalinus begins the examination of divine being through the doctrine of necessary and possible being.This treatment is developed by a large quotation from Avicenna's Liber de philosophia prima, which covers almost two chapters of the first book. 101With this quotation, Gundissalinus can expose the ontological difference between the necessary Existent, whose existence is altera formatur.Quae autem oppositarum proprietatum sunt, nunquam ad aliquid constituendum per se conveniunt.Forma igitur et materia in constitutione corporis per se non conveniunt.Quae autem per se non conveniunt, profecto, cum in aliquo sibi opposita inveniuntur, quod compositorem habeant, evidenter ostendunt.Omne igitur corpus compositorem habet.Sic itaque totus mundus».99 Ibid., p. 4,8-22: «Omne, quod est, aut coepit esse aut non coepit esse; aut habet initium aut caret initio.Quod autem aliqua habeant initium, manifeste indicat resolutio huius sensibilis mundi.Multa enim videmus hic desinere esse, quae, nisi aliquando incepissent, non desinerent unquam.Nihil enim occidit, quod non oritur, nec solutio nisi compositionem sequitur.Quicquid enim intellectus dividit et resolvit in aliquid, compositum est ex his, in quae resolvitur.Cum ergo multa ex tam diversis composita assidue corrumpi et dissolvi videamus, nihil autem corrumpitur nisi quod generatum est, sed omne, quod generatur, incipit fieri, quod non erat: profecto necesse est, ut quaecumque corrumpi videamus, ea aliquando incepisse dicamus.Omni autem incipienti esse aliqua res sibi dedit esse.Et omne, quod incipit esse, antequam sit, possibile est illud esse, quia, quod impossibile est esse, nunquam incipit esse, sed quod possibile est esse». 100 uncaused and sufficient, the possible being, that is, the potential existence not yet caused by the necessary Existent, and finally the necessary existent per aliud, the ontological state of the actual existence of possible beings. 102God's existence is therefore necessary and uncaused, and he is the first cause of everything.At this highest level of ontology and efficient causality, the necessary Existent stands alone: Gundissalinus presents five proofs of the Unicity and Unity of God's being that is completely unrelated in his highest form of existence.This One, pure Being, is the efficient cause of every subsequent being that receives its existence and unity from the first cause, God: The first part of the De processione mundi is thus focused on three main points: 1) the justification of the metaphysical analysis presented herein; 2) the demonstration of the existence of the first Cause through four proofs; 3) the examination of God's being by the doctrine of necessary and possible being.The ascending course of this speculative analysis is quite clear, and after having claimed the necessity of divine existence, Gundissalinus passes to the study of the principles of caused beings: matter and form.
The Toledan philosopher is one of the most fervent supporters of universal hylomorphism, which asserts that every created being is composed of matter and form, and its possible existence is first explained as the potentiality of the two hylomorphic principles before their union.Since they are the first principles of caused being, matter and form are also the first effects of God's creation.In fact, Gundissalinus differentiates between four different typologies of cosmogonic causation: 'Motus igitur primae causae, quo scilicet prima causa movet, alius dicitur creatio, alius compositio; sed primus est creatio, secundus est compositio.Motus vero secundariae causae cuiusdam tantum est compositio, cuiusdam et generatio.Nam compositio alia est primaria, alia secundaria.Primaria est ex simplicibus, secundaria est ex compositis; et secundaria alia naturalis, alia artificialis.Et creatio, quidem est a primordio primorum principiorum ex nihilo.Compositio vero est primarum rerum ex ipsis principiis, quae semel factae nunquam occidunt, utpote ex prima conformatione compactae.Generatio vero est ex eisdem principiis eorum, quae nascuntur et occidunt usque, non per ea, quae composita sunt, reparatio, tamquam de residuis minutiis denuo confecta rerum protractio'. 104d's causation is twofold.On the one hand, God creates matter and form and on the other hand, he joins them through the primaria compositio, whose outcome is the secondary cause.The causation of this secondary cause is the secundaria compositio and, through further causative mediations, generation and corruption.
After having clarified the typologies of cosmogonic causality, Gundissalinus continues to the specific analysis of matter and form as ontological principles.Both matter and form have a potential being in themselves, whose actuation derives from their union into the hylomorphic compound; this is Gundissalinus's main justification of contingency as the most intrinsic characteristic of creatural being, as none of the ontological principles are themselves sufficient to be without their hylomorphic partner.
The examination of the ontological status of matter and form is followed by Gundissalinus's refutation of the theory of primordial chaos. 105The criticisms presented derive mainly from William of Conches's discussion of the same topic and are directed against Hughes of Saint Victor, 106 an author directly quoted by Gundissalinus. 107By assuming an elemental chaos as primary effect of God's causation, the Toledan philosopher claims that the theory of primordial chaos is based on a contradiction.In fact, the existence of matter and form precedes that of the elements, and moreover, the latter are characterized by their intrinsic tendency toward their natural place.
The discussion of primordial chaos leads Gundissalinus to the analysis of the causative modality that first follows creation: primary composition.Matter is first joined with the forms of unity and substantiality, which turn the matter into one substance. 108This first 'absolute' substance is then specified by the forms of spirituality and corporeality that produce the first two species of substance: spiritual and corporeal substances. 109 is through this hierarchical order that the first composed beings, the angelic creatures, the celestial spheres, and the corporeal elements, come to be.These three species of beings perform the role of secondary causes, administering God's will: 'In generatione vero et commixtione et conversione et aliorum compositione, quae secundae vel tertiae dignitatis sunt, aliud sibi artifex adaptavit instrumentum, scilicet secundariam causam, ita quidem, ut per se ipsum prima efficeret, scilicet creando materiam et formam de nihilo et componendo ea inter se, secunda vero atque per ordinem tertia et quarta ministrae suae causae secundariae moderatione eius et instituto exequenda committeret'. 110e operations pursued by the secondary causality are reciprocally bonded.Developing his theory through an Avicennian perspective, Gundissalinus states that the angels create new souls daily and move the spheres, while the latter's movement is transmitted from sphere to sphere to the elements that constitute the earth, where nature orders this movement into the natural and biological changes we experience. 111ndissalinus's analysis of cosmological causation ends here, as the author does not deal with secondary composition and generation.The reason for this absence is quite evident; the Toledan philosopher is offering a metaphysical examination of God and creatural being, so the examination of secundaria compositio and generatio must be pursued by physics rather than metaphysics.The De processione mundi ends with a general recapitulation of the previously developed analysis: 'Sic igitur processit totius mundi constitutio de nihil esse ad possibiliter esse, de possibiliter esse ad actu esse et de actu esse ad corporeum et incorporeum esse; et hoc totum simul, non in tempore.Ratio enim exigebat, ut institutio mundi universalis hoc modo progrederetur, videlicet ut primum materia et forma de nihilo crearentur, deinde de materia et forma elementa et cetera praedicta componerentur, de elementis vero commixtis et conversis elementata omnia generarentur; videlicet ut primum prima simplicia fierent de nihilo per creationem et de simplicibus composita fierent per primam simplicium coniunctionem, deinde de compositis fierent elementata per generationem.Et sic 109 Ibid., 43,8-21. 110Ibid., 51,6-12. 111Ibid., pp.51,24-52,24.
de nihilo ad simplicia, de simplicibus ad composita, de compositis ad generata facta est progression'. 112e instauration of the world followed a rational order, a progressive complication of reality from the simplest being to the multiplicity of corporeal beings.This reference to the ratio and the ontogonic progression must be read as a plea for the completeness of the cosmic instauration, and this is proven by the last lines of De processione.Here, Gundissalinus presents two curious numerological syntheses 113 of his metaphysics, where the rationality and exhaustiveness of God's instauration are justified by their reference to the greatest example of those characteristics: numbers.In this perspective, the first progression is particularly exemplary of what the author has in mind.Since 'omnia enim secundum rationem numerorum sapientissimus conditor instituere voluit' 114 one can easily see that number one is like God, the pure One that causes everything, while number two is like the first effect of God, e.g., matter and form.Number three, then, refers to the first being composed by matter and form, since this kind of creature is characterized by perpetuity and stability, similar to number three.Finally, number four is like the corporeal beings derived from secondary composition and generation that suffer a twofold division (into elements and into matter and form) and are composed by the four elements.In this way, Gundissalinus concludes, 'secundum haec disposita consistit omnis creatura'. 115om this cursory exposition of the discussion in the De processione mundi, the progression of the features presented herein can be summarized by the following table : Topic: Pages: Preliminary demonstrations of the existence of the first cause 1,1-5,14 Demonstration of the unrelated and first unity of God's being 5,15-17,10 Analysis of matter and form as primary effects of divine causality, and their mutual relations 17,11-36,8 Examination of the order of substances and forms during the first composition 38,22-51,12 Analysis of the secondary causality on the instauration of the world 51,12-55,5 Final justifications regarding the rationality and completeness of creative order 54,5-56,12 At first glance, the thematic articulation of the discussion of De seems to only partially correspond to what has been exposed in De scientiis.A few remarks can be made about this purpose.First, one can underscore that the first two aspects metaphysics must take into account, that is, the analysis of the caused essences and the verification of the principles of physics and mathematics, are absent from Gundissalinus's discussion in De processione.This fact can be justified considering that the first two stages of the metaphysical programme are quite autonomous, and the same programme exposed by Gundissalinus is focused mainly on the development of the following stages of metaphysics.Thus, one could possibly explain the absence of a treatment of these first stages in the De processione supposing that Gundissalinus wanted to deal with the third, and properly analytical stage, of metaphysical articulation.This consideration seems to be correct.We have seen that the De scientiis claims that these stages are properly partes of metaphysics, and by these it is quite probable that the Toledan philosopher had the last part of metaphysics in greater consideration, leaving the other two aside.Moreover, the short discussion of the relations among intellective powers and discipline, derived from Boethius, can be read as an implicit reference to the second Farabian stage of metaphysical analysis, which cannot be said about the first stage.
Even admitting this hypothesis, there exist obvious discrepancies between the metaphysical programme exposed in the De scientiis, De divisione, and the discussion presented in the De processione,which also examines the third stage of divine science.As we have seen, this stage deals with the examination of incorporeal substantial essences, stating their multiplicity, finiteness, inequality in existence, and ontological order. 116Yet, in the De processione Gundissalinus presents his four proofs of the existence of the first cause in a discussion that seems distant from what is claimed in the De scientiis and the De divisione philosophiae.
An apparent proximity can perhaps be detected in regards to some of the outcomes and features presented in the De processione.Gundissalinus deals with some substantial characteristics of corporeal beings which he uses as points of departure for his demonstrations, but this does not seem sufficient enough to link this discussion to the analysis of the essences stated in the epistemological writings.However, the outcomes of Gundissalinus's proofs appeal to the finiteness, multiplicity, and ontological differences between bodies and their principles (matter and form).These characteristics are listed in scientiis, but it seems difficult to assume a direct link between De processione and De scientiis regarding these issues.The only aspect one can properly claim as a sign of coherence between the two treatises is the common ascending course from the effects of divine causality to God himself.This ascending and descending progress is a peculiar trait of the Farabian programme, where it is expressed by the examination of the order by which the essences are caused (their dispositio,in the terminology used in the De processione).Through this examination one arrives at admitting God's existence.This feature is clearly stated in the metaphysical treatise, since the a posteriori demonstrations proposed by Gundissalinus 'ascend' from the effects to the efficient cause of every being, departing from four different preliminary considerations, as we have seen.
The highest point in this ascending procedure is the analysis of the first cause itself.Regarding this aspect, the programme states that one has to demonstrate that the first cause is the cause of existence, unity, and truth of every subsequent being, that it has no multiplicity, definition, or similarity to other beings, and that the first cause is God. 117The discussion of God's being in the De processione mundi parallels this course.By quoting Avicenna, Gundissalinus demonstrates, through five proofs, the unrelated unicity and oneness of the first cause, who is the necessary Existent, ontological and efficient cause of every subsequent being.Therein, Gundissalinus clarifies that God's unity is complete and cannot imply any kind of multiplicity or similarity to caused creatures.The primary consequence of this position is that, in his transcendent unity, it is not possible to provide a definition of God.
De scientiis, De divisione and De procession also share parallels regarding the descending course of the metaphysical method.The following analytical step presented by al-Fārābī is the examination of the essences regarding their causation by God, and the analysis of their order and mutual relations.Gundissalinus exposes this feature through the examination of matter and form, e.g., the ontological constituents of every caused being and the only things directly created by God.In dealing with this topic, the Toledan philosopher analyses the mutual relation between matter and form and their derivation from God's being, stating that matter is progressively informed by the forms of unity and substantiality, and by those of spirituality and corporeality.The consistency of the epistemological treatises with the De processione mundi regarding these two stages of the metaphysical programme is thus complete.
The same outcome results from the comparison of the following stage, e.g., the examination of divine operations on the essences.Clearly, these operations are the causal mediation in the instauration of the world, expressed by the secondary cause.This feature is central to the De processione, as it is only through the instrumental causality of angels, spheres, and elements that the sensible world is caused and ordered.
Finally, the De processione ends with the two arithmological syntheses that are briefly mentioned herein and by stating the completeness and rationality of the divine order.Here too, Gundissalinus follows the procedure presented in De scientiis and De divisione, where the analysis of secondary causes is followed by these two demonstrations.
One should note that the metaphysical programme ends with a peculiar final stage which examines the refutation of the errors regarding God and the creative process.It is true that De processione does not end by dealing with this issue.Nevertheless, Gundissalinus's discussion of the most important error regarding cosmogony is presented a few pages earlier, where the Toledan philosopher rejects the theory of primordial chaos.This section is surely related to the specular stage of the epistemological treatises, and as has been shown by D. Poirel,118 this problem had great relevance during the twelfth-century.
Gundissalinus anticipates the discussion of primordial chaos, presenting this issue after the treatment of matter and form and before the exposition of secondary causes.The reason for this anticipation is that Gundissalinus' solution to the problem of primordial chaos is exactly the doctrine of universal hylomorphism, and thus he affirms the priority of matter and form with regard to the elements of the supposed primordial chaos.Aiming at a more coherent doctrinal system, this solution needed to be posed before the discussion of secondary causes (one modality of which is expressed by the elements) and is directly linked to the overall examination of hylomorphism.

Conclusion
The Analysis of matter and form as primary effects of divine causality, and their mutual relations.
Analysis of the order and the mutual relations among essence.
Examination of the order of substances and forms during the first composition.
Question regarding God's further operations on the essences, e.g., divine causation besides ontogony.
Analysis of the secondary causality in the instauration of the world.
Demonstration of the completeness of the world's instauration and order.
Final justifications regarding the rationality and completeness of creative order.
Refutation of errors regarding God and his operations.

Rejection of the error regarding primordial chaos
From the doctrinal comparison, Gundissalinus's attempt to pursue and apply the metaphysical programme derived from al-Fārābī's Kitab Iḥṣā' al-ʿulūm results is clear.On the one hand, it is evident that the Toledan philosopher does not seem to be completely consistent regarding this methodological procedure, at least in relation to the first steps of its application.In fact, the first stage is absent from De processione, while traces of the second can be detected in Gundissalinus's reference to Boethius's division of science and intellectual powers. 119On the other hand, we have already seen that the discrepancies between the consideration of these two first steps of the metaphysical programme as partes in the De scientiis and as methodological stages in the De divisione can partially justify the scarce relevance ascribed to them in De processione.
Similar difficulties arise from the comparison with the third stage of the programme.This lack of consistency is attenuated by the consideration of the outcomes produced by Gundissalinus's demonstrations of the existence of the first cause, which are very close to what is stated in the two epistemological treatises.
119 Regarding this reference to Boethius, Fidora demonstrated that Gundissalinus's exposition of the Boethian divisio scientiarum in this place is different in many points of view from the same articulation presented in the De divisione philosophiae, and that could be the result of a possible changing of mind of the Toledan author.But it is undoubted that by this quotation Gundissalinus clearly makes reference to his epistemological treatise and to the division of theoretical sciences: a fact that can possibly be linked to the application of the same metaphysical programme.See Fidora, 'La metodología de las ciencias según Boecio', op.cit.
The subsequent stages of the programme are pursued in explicit conformity with the epistemological texts.God's description as absolute One and pure Being and the arguments in favour of his unrelated condition are in absolute conformity with them.The same is true regarding the whole descending phase of the progression, apart from the refutation of primordial chaos, as we have already seen.By all this, Gundissalinus's will to apply the Farabian metaphysical programme seems quite evident, even if not completely developed and carried out, which is significant.

94
Ibid., pp.41,5-16.a) what are these essences; is formed by those disciplines that lead to the achievement of
Constat ergo, quod necesse esse neque est relativum, neque est mutabile, nec multiplex, sed solitarium, cum nihil aliud participat in suo esse, quod est ei proprium; et hoc non est nisi solus deus, qui est prima causa et primum principium omnium, quod unum tantum necesse est intelligi, non duo vel plura.Unum enim duobus prius est; omne enim illud prius est alio, quod destructum destruit et positum non ponit.[...] Unum igitur est principium, una est causa efficiens omnium'. 103 outcomes of this doctrinal comparison between De scientiis, De divisione, and De processione mundi can be summarized by the following table: Gundissalinus's philosophical production is aimed at providing new solutions to many key epistemological, psychological, and metaphysical problems through the development and application doctrines derived from the Islamic and Jewish writings he translated.