Commentaria in Primam Partem Summae Theologiae
Tommaso de Vio Cajetan (1469–1534)
First published 1507
Cajetan's Commentaria in Primam Partem Summae Theologiae offers an article-by-article exposition of Aquinas's Prima Pars. Its discussions of sacred doctrine, analogy, divine knowledge, and creation became important reference points in the later Thomist tradition. The present digital edition follows the Latin text of the Leonine edition and includes English and Spanish translations. Coverage is currently partial.
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Praefatio ad Oliverium Carrafam
In Prooemium Summae Theologiae
Quaestio I: De sacra doctrina, qualis sit, et ad quae se extendat
Articulus I: Utrum sit necessarium, praeter philosophicas disciplinas, aliam doctrinam haberi
Articulus II: Utrum sacra doctrina sit scientia
Articulus III: Utrum sacra doctrina sit una scientia
Articulus IV: Utrum sacra doctrina sit scientia practica
Articulus V: Utrum sacra doctrina sit dignior aliis scientiis
Articulus VI: Utrum haec doctrina sit sapientia
Articulus VII: Utrum deus sit subiectum huius scientiae
Articulus VIII: Utrum haec doctrina sit argumentativa
Articulus IX: Utrum sacra scriptura debeat uti metaphoris
Articulus X: Utrum sacra scriptura sub una littera habeat plures sensus
Quaestio II: De Deo, an Deus sit
Articulus I: Utrum Deum esse sit per se notum
Articulus II: Utrum Deum esse sit demonstrabile
Articulus III: Utrum Deus sit
Quaestio III: De Dei simplicitate
Articulus I: Utrum Deus sit corpus
Articulus II: Utrum in Deo sit compositio formae et materiae
Articulus III: Utrum sit idem Deus quod sua essentia vel natura
Articulus IV: Utrum in Deo sit idem essentia et esse
Articulus V: Utrum Deus sit in genere aliquo
Articulus VI: Utrum in Deo sint aliqua accidentia
Articulus VII: Utrum Deus sit omnino simplex
Articulus VIII: Utrum Deus in compositionem aliorum veniat
Quaestio IV: De Dei perfectione
Articulus I: Utrum Deus sit perfectus
Articulus II: Utrum in Deo sint perfectiones omnium rerum
Articulus III: Utrum aliqua creatura possit esse similis Deo
Quaestio V: De bono in communi
Articulus I: Utrum bonum differat secundum rem ab ente
Articulus II: Utrum bonum secundum rationem sit prius quam ens
Articulus III: Utrum omne ens sit bonum
Articulus IV: Utrum bonum habeat rationem causae finalis
Articulus V: Utrum ratio boni consistat in modo, specie et ordine
Articulus VI: Utrum convenienter dividatur bonum per honestum, utile et delectabile
Quaestio VI: De bonitate Dei
Articulus I: Utrum esse bonum Deo conveniat
Articulus II: Utrum Deus sit summum bonum
Articulus III: Utrum esse bonum per essentiam sit proprium Dei
Articulus IV: Utrum omnia sint bona bonitate divina
Quaestio VII: De infinitate Dei
Articulus I: Utrum Deus sit infinitus
Articulus II: Utrum aliquid aliud quam Deus possit esse infinitum per essentiam
Articulus III: Utrum possit esse aliquid infinitum actu secundum magnitudinem
Articulus IV: Utrum possit esse infinitum in rebus secundum multitudinem
Quaestio VIII: De existentia Dei in rebus
Articulus I: Utrum Deus sit in omnibus rebus
Articulus II: Utrum Deus sit ubique
Articulus III: Utrum Deus sit ubique per essentiam, praesentiam et potentiam
Articulus IV: Utrum esse ubique sit proprium Dei
Quaestio IX: De Dei immutabilitate
Articulus I: Utrum Deus sit omnino immutabilis
Articulus II: Utrum esse immutabile sit Dei proprium
Quaestio X: De Dei aeternitate
Articulus I: Utrum convenienter definiatur aeternitas, quod est interminabilis vitae tota simul et perfecta possessio
Articulus II: Utrum Deus sit aeternus
Articulus III: Utrum esse aeternum sit proprium Dei
Articulus IV: Utrum aeternitas differat a tempore
Articulus V: De differentia aevi et temporis
Articulus VI: Utrum sit unum aevum tantum
Quaestio XI: De unitate Dei
Articulus I: Utrum unum addat aliquid supra ens
Articulus II: Utrum unum et multa opponantur
Articulus III: Utrum Deus sit unus
Articulus IV: Utrum Deus sit maxime unus
Quaestio XII: Quomodo Deus a nobis cognoscatur
Articulus I: Utrum aliquis intellectus creatus possit Deum videre per essentiam
Articulus II: Utrum essentia Dei ab intellectu creato per aliquam similitudinem videatur
Articulus III: Utrum essentia Dei videri possit oculis corporalibus
Articulus IV: Utrum aliquis intellectus creatus per sua naturalia divinam essentiam videre possit
Articulus V: Utrum intellectus creatus ad videndum Dei essentiam aliquo creato lumine indigeat
Articulus VI: Utrum videntium essentiam Dei unus alio perfectius videat
Articulus VII: Utrum videntes Deum per essentiam ipsum comprehendant
Articulus VIII: Utrum videntes Deum per essentiam omnia in Deo videant
Articulus IX: Utrum ea quae videntur in Deo a videntibus divinam essentiam per aliquas similitudines videantur
Articulus X: Utrum videntes Deum per essentiam simul videant omnia quae in ipso vident
Articulus XI: Utrum aliquis in hac vita possit videre Deum per essentiam
Articulus XII: Utrum per rationem naturalem Deum in hac vita cognoscere possimus
Articulus XIII: Utrum per gratiam habeatur altior cognitio Dei quam ea quae habetur per rationem naturalem
Quaestio XIII: De nominibus Dei
Articulus I: Utrum aliquod nomen Deo conveniat
Articulus II: Utrum aliquod nomen dicatur de Deo substantialiter
Articulus III: Utrum aliquod nomen dicatur de Deo proprie
Articulus IV: Utrum nomina dicta de Deo sint nomina synonyma
Articulus V: Utrum ea quae de Deo dicuntur et creaturis, univoce dicantur de ipsis
Articulus VI: Utrum nomina per prius dicantur de creaturis quam de Deo
Articulus VII: Utrum nomina quae important relationem ad creaturas, dicantur de Deo ex tempore
Articulus VIII: Utrum hoc nomen *Deus* sit nomen naturae
Articulus IX: Utrum hoc nomen *Deus* sit communicabile
Articulus X: Utrum hoc nomen *Deus* univoce dicatur de Deo per participationem, secundum naturam, et secundum opinionem
Articulus XI: Utrum hoc nomen *qui est* sit maxime nomen Dei proprium
Articulus XII: Utrum propositiones affirmativae possint formari de Deo
Quaestio XIV: De scientia Dei
Articulus I: Utrum in Deo sit scientia
Articulus II: Utrum Deus intelligat se
Articulus III: Utrum Deus comprehendat seipsum
Articulus IV: Utrum ipsum intelligere Dei sit eius substantia
Articulus V: Utrum Deus cognoscat alia a se
Articulus VI: Utrum Deus cognoscat alia a se propria cognitione
Articulus VII: Utrum scientia Dei sit discursiva
Articulus VIII: Utrum scientia Dei sit causa rerum
Articulus IX: Utrum Deus habeat scientiam non entium
Articulus X: Utrum Deus cognoscat mala
Articulus XI: Utrum Deus cognoscat singularia
Articulus XII: Utrum Deus possit cognoscere infinita
Articulus XIII: Utrum scientia Dei sit futurorum contingentium
Articulus XIV: Utrum Deus cognoscat enuntiabilia
Articulus XV: Utrum scientia Dei sit variabilis
Articulus XVI: Utrum Deus de rebus habeat scientiam speculativam
Quaestio XV: De ideis
Articulus I: Utrum ideae sint
Articulus II: Utrum sint plures ideae
Articulus III: Utrum omnium quae cognoscit Deus, sint ideae
Quaestio XVI: De veritate
Articulus I: Utrum veritas sit tantum in intellectu
Articulus II: Utrum veritas sit in intellectu componente et dividente
Articulus III: Utrum verum et ens convertantur
Articulus IV: Utrum bonum secundum rationem sit prius quam verum
Articulus V: Utrum Deus sit veritas
Articulus VI: Utrum sit una sola veritas, secundum quam omnia sunt vera
Articulus VII: Utrum veritas creata sit aeterna
Articulus VIII: Utrum veritas sit imutabilis
Quaestio XVII: De falsitate
Articulus I: Utrum falsitas sit in rebus
Articulus II: Utrum in sensu sit falsitas
Articulus III: Utrum falsitas sit in intellectu
Articulus IV: Utrum verum et falsum sint contraria
Quaestio XVIII: De vita Dei
Articulus I: Utrum omnium naturalium rerum sit vivere
Articulus II: Utrum vita sit quaedam operatio
Articulus III: Utrum Deo conveniat vita
Articulus IV: Utrum omnia sint vita in Deo
Quaestio XIX: De voluntate Dei
Articulus I: Utrum in Deo sit voluntas
Articulus II: Utrum Deus velit alia a se
Articulus III: Utrum quidquid Deus vult, ex necessitate velit
Articulus IV: Utrum voluntas Dei sit causa rerum
Articulus V: Utrum voluntatis divinae sit assignare aliquam causam
Articulus VI: Utrum voluntas Dei semper impleatur
Articulus VII: Utrum voluntas Dei sit mutabilis
Articulus VIII: Utrum voluntas Dei necessitatem rebus volitis imponat
Articulus IX: Utrum voluntas Dei sit malorum
Articulus X: Utrum Deus habeat liberum arbitrium
Articulus XI: Utrum sit distinguenda in Deo voluntas signi
Articulus XII: Utrum convenienter circa divinam voluntatem ponantur quinque signa
Quaestio XX: De amore Dei
Articulus I: Utrum amor sit in Deo
Articulus II: Utrum Deus omnia amet
Articulus III: Utrum Deus aequaliter diligat omnia
Articulus IV: An Deus semper magis diligat meliora
Quaestio XXI: De iustitia et misericordia Dei
Articulus I: Utrum in Deo sit iustitia
Articulus II: Utrum iustitia Dei sit veritas
Articulus III: Utrum misericordia competat Deo
Articulus IV: Utrum in omnibus operibus Dei sit misericordia et iustitia
Quaestio XXII: De providentia Dei
Articulus I: Utrum providentia Deo conveniat
Articulus II: Utrum omnia sint subiecta divinae providentiae
Articulus III: Utrum Deus immediate omnibus provideat
Articulus IV: Utrum providentia rebus provisis necessitatem imponat
Quaestio XXIII: De praedestinatione
Articulus I: Utrum homines praedestinentur a Deo
Articulus II: Utrum praedestinatio aliquid ponat in praedestinato
Articulus III: Utrum Deus aliquem hominem reprobet
Articulus IV: Utrum praedestinati eligantur a Deo
Articulus V: Utrum praescientia meritorum sit causa praedestinationis
Articulus VI: Utrum praedestinatio sit certa
Articulus VII: Utrum numerus praedestinatorum sit certus
Articulus VIII: Utrum praedestinatio possit iuvari precibus sanctorum
Quaestio XXIV: De libro vitae
Articulus I: Utrum liber vitae sit idem quod praedestinatio
Articulus II: Utrum liber vitae sit solum respectu vitae gloriae praedestinatorum
Articulus III: Utrum aliquis deleatur de libro vitae
Quaestio XXV: De divina potentia
Articulus I: Utrum in Deo sit potentia
Articulus II: Utrum potentia Dei sit infinita
Articulus III: Utrum Deus sit omnipotens
Articulus IV: Utrum Deus possit facere quod praeterita non fuerint
Articulus V: Utrum Deus possit facere quae non facit
Articulus VI: Utrum Deus possit meliora facere ea quae facit
Quaestio XXVI: De divina beatitudine
Articulus I: Utrum beatitudo Deo competat
Articulus II: Utrum Deus dicatur beatus secundum intellectum
Articulus III: Utrum Deus sit beatitudo cuiuslibet beati
Articulus IV: Utrum in Dei beatitudine omnis beatitudo includatur
Quaestio XXVII: De processione divinarum personarum
Articulus I: Utrum processio sit in divinis
Articulus II: Utrum aliqua processio in divinis generatio DICI possit
Articulus III: Utrum sit in divinis alia processio a generatione verbi
Articulus IV: Utrum processio amoris in divinis sit generatio
Articulus V: Utrum sint plures processiones in divinis quam duae
Quaestio XXVIII: De relationibus divinis
Articulus I: Utrum in Deo sint aliquae relationes reales
Articulus II: Utrum relatio in Deo sit idem quod sua essentia
Articulus III: Utrum relationes quae sunt in Deo, realiter ab invicem distinguantur
Articulus IV: Utrum in Deo sint tantum quatuor relationes reales, scilicet paternitas, filiatio, spiratio et processio
Quaestio XXIX: De personis divinis
Articulus I: De definitione personae
Articulus II: Utrum persona sit idem quod hypostasis, subsistentia et essentia
Articulus III: Utrum nomen personae sit ponendum in divinis
Articulus IV: Utrum hoc nomen persona significet relationem
Quaestio XXX: De pluralitate personarum in divinis
Articulus I: Utrum sit ponere plures personas in divinis
Articulus II: Utrum in Deo sint plures personae quam tres
Articulus III: Utrum termini numerales ponant aliquid in divinis
Articulus IV: Utrum hoc nomen persona possit esse commune tribus personis
Quaestio XXXI: De his quae ad unitatem vel pluralitatem pertinent in divinis
Articulus I: Utrum sit Trinitas in divinis
Articulus II: Utrum Filius sit alius a patre
Articulus III: Utrum dictio exclusiva solus sit addenda termino essentiali in divinis
Articulus IV: Utrum dictio exclusiva possit adiungi termino personali
Quaestio XXXII: De divinarum personarum cognitione
Articulus I: Utrum Trinitas divinarum personarum possit per naturalem rationem cognosci
Articulus II: Utrum sint ponendae notiones in divinis
Articulus III: Utrum sint quinque notiones
Articulus IV: Utrum liceat contrarie opinari de notionibus
Quaestio XXXIII: De persona Patris
Articulus I: Utrum competat Patri esse principium
Articulus II: Utrum hoc nomen Pater sit nomen proprie divinae personae
Articulus III: Utrum hoc nomen Pater dicatur in divinis per prius secundum quod personaliter sumitur
Articulus IV: Utrum esse ingenitum sit Patri proprium
Quaestio XXXIV: De persona Filii
Articulus I: Utrum verbum in divinis sit nomen personale
Articulus II: Utrum verbum sit proprium nomen Filii
Articulus III: Utrum in nomine verbi importetur respectus ad creaturam
In the title, note ly in the name of the Word. For the question is not whether the thing that is the Word has a regard to creatures, but whether that divine thing, as signified by the name "Word," includes some regard to creatures.
II. In the body he does three things. First, there is set forth the conclusion that directly answers the question affirmatively, together with its middle term: and thus he answers with respect to the relation in general. Second, by determining what sort of relation that is, he answers concerning such a relation, though one common to the Father and to creatures. Third, by making a distinction, he answers concerning that relation whereby he is related to creatures only.
III. As to the first, the conclusion concerns relation in general, just as the question was also posed in general. And it is this: In the Word of God there is signified a relation to creatures. – And the middle term is immediately added: because God, in knowing himself, knows creatures.
As for second, the middle term of the argument is expounded by applying it more closely to the conclusion restricted to this respect, namely: The Word of God is expressive of the Father and of creatures. – For it is proved thus. The Word is representative of everything that is actually understood; therefore the Word of God is expressive not only of the Father, but also of creatures. – The antecedent is proved in us, in whom there are diverse words according to diverse things actually understood. But the consequence is proved because God understands Himself and all things by a single act.
As to the third, the conclusion is this: The Word of God, which is in God the Father, is expressive only; but that of creatures is both expressive and operative. – It is proved thus. God's knowledge is merely cognitive of God, whereas of creatures it is cognitive and productive: therefore the Word of God, etc. And it is confirmed by the authority of Scripture: "He spoke, and they were made".
IV. Concerning the foregoing, and this whole matter, note that there are four things here: first, the things spoken by the Word; second, the relation between the Word and the thing spoken; third, the manner in which the Word is referred to the things spoken; fourth, the reason why it is so referred. And as to the things spoken, in the first article of this question, in the reply to 3, we held that they are these three, namely the divine essence, the divine persons, and every creature: for the Father speaks all these things in the Word. The relation of the Word to the things spoken, as such, is a relation of reason: and it is the relation of that which expresses to what is expressed, as is said in the text. And in these two points the others agree with us, compelled perhaps by the authority of Augustine.
In the other two respects, however, namely the mode and the cause, there is a diversity of opinions. For Scotus, in Book II, distinction 1, question 1, article 2, and in his Quodlibets, question 14, article 2, holds that the Word of God, by the force of its production, proceeds not from the knowledge of creatures but from the divine essence. And again, as is gathered from distinction 32 of Book I, question 1, ad ultimum, of the same work, he holds that the Word proceeds from the knowledge of the essence alone in such a way that it does not proceed as the Word of a person except concomitantly. So that he imagines that the Father, precisely because he understands the divine essence, produces the Word: which indeed, by the force of its production, expresses the essence, but expresses the divine persons only concomitantly, as things necessarily joined to the essence; while it has that it represents creatures, the production of the Word itself being already complete.
V. Now the foundation of his position is this: he holds, in distinction XXXV of the First Book, that creatures are produced by God in known being (esse cognitum). And on that account he imagines that the divine essence first, as it were, moves the Father's intellect to the production of the infinite term, that is, the Word; and then to the finite term, that is, the creature in known being. And thus the Word cannot be produced from knowledge of creatures, which exists in the second instant of nature.
He also argues for this in the Second Book, where above, in three ways. First. If the Word were to proceed as Word of the divine essence and of every intelligible, then by equal reason the Holy Spirit would be breathed forth as love of the divine essence and of everything lovable as understood: but this is false; therefore. The falsity is proved: because then either God would necessarily love creatures, or the Holy Spirit would not be produced necessarily; both of which are impossible. – Second. If the Word were to proceed from all things etc., therefore he would proceed from himself, the Word, as known by the Father: which is unfitting. And the inference holds: because one of the things understood formally by the Father is the Word. – Third. No real relation of any divine person is toward a creature: but being begotten of that from which one is begotten, if it is really distinct, is a real relation; therefore the Word is not begotten of a stone as known by the Father.
VI. St. Thomas, however, as is evident here, holds that the Word of God is born from all things that are in the knowledge of the Father, namely, the essence, the persons, and every other simple intelligible (which I say on account of the things known by God in the science of vision). For he imagines, as he expressly says in the first article1, that the Father, in understanding himself and the Son and the Holy Spirit and every creature (understand this, by a simple act of understanding), conceives the Word: so that, prior in the order of reason, God the Father understands whatever naturally shines forth in the divine essence before he produces the Son.
Yet it is true that the Word primarily expresses the essence, and secondarily creatures; just as God the Father primarily understands His own essence, and secondarily creatures: so that ly primarily and ly secondarily signify nothing other than in itself and in another; for the creature is in the divine essence, while that essence itself is understood and expressed in itself.
VII. But it is easy to answer the Scotist imaginings. For that the primary foundation2 is of no worth is clear from this, that that production of creatures is chimerical, and instills a dangerous doctrine. For it follows that the glorious God cannot be without there being creatures in diminished being: which seems ridiculous in philosophy, but in faith a scandal. But of these elsewhere3. For we, holding that the divine essence comprehends every intelligible both formally and objectively, say from what was determined above4 that, because the Word proceeds not from just any cognition of the divine essence, but from the comprehension of the same, it must proceed from the knowledge of all things that are known by comprehending the divine essence. But these are all the things said above5, as is clear from qu. XIV6. Therefore.
And this was without doubt the foundation of St. Thomas. From which, in answer to Scotus's first objection7 it is briefly said that, speaking uniformly—that is, of the creature understood in God, and likewise loved in God—the same reasoning holds for the Word and the Holy Spirit: nor does any inconvenience follow. – Yet one could simply deny both the consequence and the parity of reason: because love regards things lovable in themselves, whereas the word regards things as they are in the intellect.
To the second, it is said that there is nothing unfitting in the Word proceeding from Himself and from the Holy Spirit as known by the Father, that is, from the knowledge which the Father has of them; indeed, this is necessary, on account of the reason adduced. Rather, since Scotus himself expressly holds, in the Sixth Distinction of the First Book, that the Father understands the Son before He produces Him, he is reckoned voluntarily to regard this as unfitting.
The third objection, however, is not worthy of a response: since the Word is not really distinct from those things from which He proceeds as known, but from that from which He proceeds as speaking; as is evident of itself.
VIII. Be cautious, however, in this matter, on account of the conditional truth, namely: If God understood nothing in His essence but that essence alone, there would still be a production of the Word. For from this it seems to follow that the production of the Word is not posterior to the intellection of creatures in God. You have, moreover, another conditional: If God were not productive ad intra by understanding Himself, He would nevertheless understand every intelligible. For from this it follows that God's understanding of creatures in Himself is not posterior to the production ad intra. Therefore, lest you be deceived by these—since it naturally holds in fact by following 8—say as above 9 I said, however, naturally, because those things which God freely knows in fact, since the natural precedes the free, are far removed from this disputation. – And since within the comprehension of the natural power of the divine science is contained the art of making creatures, although not the volition of them; therefore the Word of God, which is adequate to His natural science, has respect to the creature not only as expressive but also as operative, as is said in the text from Augustine.
IX. In response to the first, note that against it there are the arguments of Aureol, as found in Capreolus, at the twenty-seventh distinction of the First Book, question II, in conclusion 510, to prove that the Word has from a personal property that He is referred to creatures. For all these arguments collapse on this ground: they suppose that it is the same thing to say, the Word is referred to creatures according to His proper notion; and to say, the Word has from a personal property that He is referred to creatures: whereas these differ greatly, and the first can be granted while the second cannot. And the reason for this is that the Word contains within His proper notion knowledge, which belongs among the essentials: on account of which, as is said in the text, He is referred to things known and to things to be made.
X. In response to the fourth objection, note that in those words, the name "Word" was principally imposed to signify a relation to the speaker, in my judgment St. Thomas retracts what he had said in the Questions On Truth, question IV, article 5, namely that the name "Word" principally signifies something absolute. And this retraction follows upon the determination he had made in the first article here, namely that "Word" is only a personal name. So that "Word" signifies first the personal property of the Son in the concrete; and since connoted knowledge is as it were its substratum, it is therefore also referred to things said, etc. And this accords with the response to the first objection; and with the words of the preceding article, namely, "Word" signifies a certain emanation of the intellect. For it is clear that that emanation is the personal property of the Son: for unless this were first among its significates, from its own signification it would not signify the personal property of the Son in God, but only through what is connoted; the opposite of which is stated there.