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
A clear title. – In the body there is one conclusion, answering the question affirmatively: Beatitude belongs most of all to God. – It is proved. Beatitude is the perfect good of an intellectual nature; therefore it belongs most of all to God.
The antecedent has two parts: namely, that it be a perfect good; and that it be of an intellectual nature. The first is left as quasi self-evident. The second, however, is proved by an argument from the three conditions of an intellectual nature, namely, sufficiency of cognition, capacity for good or evil, and dominion over one's operations: and indeed the second corresponds to the good, the first perfect, while the third corresponds to both. – The consequence, however, is proved: because each part of the antecedent is found in the highest degree in God.
Articulus II: Utrum Deus dicatur beatus secundum intellectum
The title is to be understood formally; that is, the discourse concerns the intellect, as it is formally distinct from the divine substance and will. And since, as is said in the body of the text, the same reasoning applies to the beatitude of the saints, therefore there belongs to this article that common and well-worn question: whether beatitude consists in an act of the intellect or of the will. For the beatitude of others is a certain likeness of the divine beatitude.
II. In the body there is a single conclusion, answering the question affirmatively: Beatitude is to be attributed to God, and to other blessed beings, according to intellect. – This conclusion is both proved and explained. It is proved as follows. Beatitude is the perfect good of intellectual nature: therefore it is what is most perfect in intellectual nature: therefore it consists in understanding: therefore both God and others are blessed according to intellect. – The antecedent is evident from what has been said, and is made manifest by its effect: namely, that intellectual nature naturally desires to be blessed, just as each thing desires its own perfection. – The first consequence is not stated explicitly in the text: but we have added it for the clarity of the doctrine, and it is evident in itself. – The second, however, is proved: because what is most perfect in any intellectual nature is intellectual operation. This is proved: because by means of it it grasps in a certain way all things. – The last, moreover, is evident in itself, and is proved with respect to others: because others are said to be blessed through assimilation to the beatitude of God.
It is made manifest, however, with respect to the intellect in God from this: that although being (esse), willing, and understanding in God are the same, yet because they differ according to reason, therefore fittingly—speaking according to formal reason—beatitude is specially attributed to the intellect of God.
III. Concerning these statements, there is a threefold question. First: whether beatitude is naturally desired. Second: whether the operation of the intellect is the most perfect of all; and how much weight the argument assigned here has for this. Third: whether the conclusion itself is true. For all these things are said in the text, and they have various proponents.
IV. And since the first question will be treated in q. 821, let it suffice here to know that the intellectual nature naturally desires beatitude in three ways. First, by a natural appetite, that is, an inclination: and thus it is verified universally. Second, by a natural appetite, that is, an act of desiring, simply: and thus it is verified of God and the blessed. Third, by a natural appetite, that is, an act of desiring, natural with respect to the specification of the act, but free with respect to its exercise: and thus it is verified with respect to human beings. For we experience that with regard to beatitude we cannot will not to have it, although it is within our power freely to will or not to will it actually. But of these things there will then be fuller discussion.
V. The second question2ibidem3 will be treated in its own place, and therefore must be passed over for now. Yet regarding the argument brought forward here, note that it proves the nobility of the act of understanding above the others not from its object, as will be done later, but from its mode. For understanding comes about by grasping the intelligible, which is found to be all things; but love, and willing universally, does not come about by grasping the thing loved, but rather conversely. For the intellect, in understanding, has the understood within itself; whereas the will, in loving, as it were goes forth toward the beloved. And since, other things being equal, it is nobler to have something than to tend toward it, understanding, by the proper mode of its own genus, is nobler than every other operation. Hence, since God has His own essence as the object both of His intellect and of His will, and the act of the intellect is by the mode of its genus nobler, He is deservedly called blessed according to intellect. And the same judgment holds of the other blessed: for on the side of the object there is equality.
VI. Hence, descending to the third question4, know that Scotus, in IV, dist. XLIX, qu. IV, holds the opposite, wishing beatitude to consist principally in the act of the will which is not delight but love. And he proves his thesis in three ways. First thus: To will tends immediately to God as to the ultimate end; therefore willing is more immediately related to the ultimate end, and consequently to the first desirable object, than understanding is. – Second: Either willing is for the sake of understanding, or conversely, or neither is for the sake of the other. But the first is perverse, according to Anselm, book II of Cur Deus homo, chapter 1; and the third is impossible, as is evident; therefore there remains the second. Therefore loving is the end of intellection, and consequently more noble. – Third thus: Among intrinsic acts, some act of willing is supremely to be willed; therefore in it beatitude consists. The antecedent is proved both of natural appetite, which is an inclination, and of free appetite rightly ordered: since the will desires the perfection of itself in the ultimate end more than the perfection of the intellect.
Many other arguments are also made against this conclusion, recited by Capreolus at the XLIX distinction of Book IV, question II5, which I omit for the sake of brevity: especially because, from what is to be said in question LXXXII, and in the solution of these arguments, everything will in a way become clear.
VII. Know, therefore, that it differs greatly to compare the intellection and love of the blessed with one another, and those of the wayfarer: and again, whether simply, or in a certain respect, that is, according to this genus. For both simply, and in the blessed, intellection is better, and the end of volition. In the wayfarer, however, love excels: because it tends toward God in Himself. And likewise in a certain respect, that is, under the aspect of agent or mover, it holds first place. And from this it follows that we are said to be good or evil simply by reason of the will; and consequently that its act is called worst and best; and that it tends toward God according to the noblest genus of cause, namely as end (for it belongs to the agent as mover to move); and that it is mistress, and formally free, etc. For all these things pertain to nobility in a certain respect.
VIII. Hence the answer to the first argument of Scotus is clear6: for it sins by taking the non-cause as a cause. For what is more immediately joined must be joined to the best beingabsolutely, and not as to an end, if beatitude is to be concluded, which consists in that which is most perfect simply speaking.
To the second objection, it is now clear that Anselm must be interpreted as speaking of the love of the wayfarer.
To the third, however, nothing at all holds. First, because just as the will by natural appetite wills volition more, so the intellect understands intellection: for every power by such an appetite tends first toward its own act. – Second, because it is false that, by free will, the will would will itself more than the intellect. Since the elicited act was given by the institutor of nature to the animal appetite for this purpose, that it may first desire the supposit. And therefore, if intellection is a greater perfection of the supposit than volition, a right will prefers intellection to volition.
Articulus III: Utrum Deus sit beatitudo cuiuslibet beati
In the title, the word beatitudo must not be restricted to God's beatitude: rather, it is to be interpreted simply and absolutely, with respect to every blessed one.
II. In the body there are two twofold distinctions, with three conclusions. The first distinction is: Beatitude is twofold: namely objective; and formal, which is the very act itself. The second is that of the blessed: namely of God, and of blessed creatures. – The first conclusion is: God is the objective beatitude of all the blessed. And for this an authority of Augustine is adduced. – The second is: God is not the formal beatitude of blessed creatures. The third is: God is the formal beatitude of himself. Nor are they proved on any other ground than because the act of understanding of a creature is something created, but in God uncreated.
III. Concerning the second conclusion, know that certain authors, cited by Capreolus in II, dist. III, qu. II1, attack it, moved both by the perpetuity and infinity of the beatific vision; and by the natural impossibility of infinitely many most intense species in the same created intellect; and by the possibility of the affirmative part of the question, namely that the divine intellection itself can be equally present and intimate to any created intellect as created intellection is; and by the authority of Augustine and of the philosophers.
IV. But these considerations carry little weight. The beatific vision of the saints is indeed a created thing, of finite perfection simply speaking, but infinite in a certain respect, that is, objectively. It is also incorruptible in every way, speaking according to natural power: since on the side of the subject, of the object, and of the union of both, there is no power toward corruption. – Nor does it follow from this that the soul cannot receive as many intense species at once as it can receive many. The beatific vision, in the first place, is not ranked in number with other intellections: since it is of the most common kind, and of a higher order. Then, too, there is a state in the species to which the natural power extends, and especially when they are simultaneously in act, as will be made clearer in the treatise on the Angels2 – It is also impossible that my vital operation not be from my own intrinsic principle, since in this consists the very reason of my life: otherwise it would be vital and not vital. And therefore, since beatitude is the vital operation of the blessed, it implies that the divine essence is that operation. And either the antecedent is false, or it is a sophism of the Figure of Speech, from equal presence to manner. – The authorities, too, are to be understood objectively, if they are truly adduced.
Articulus IV: Utrum in Dei beatitudine omnis beatitudo includatur
In the title, all blessedness is distributed over every species of felicity. But the "ly" in his blessedness does not signify substantial, or simply first, beatitude, of which there was discussion in the two preceding articles: but rather the beatific state, of which the first article treated. So that the sense of the question is: Whether God is in such a state of blessedness that He has every species and perfection of felicity.
II. In the body there is a single responsive conclusion to the question: In divine beatitude there preexists in a more eminent way whatever is desirable in any beatitude, whether true or false. – And it is proven inductively in three kinds of felicity, namely the contemplative, the active, and the earthly, which consists in five things; so that all these are clearly evident in the text.
III. Concerning contemplative happiness, note that certain persons, from the words of Aristotle in Book III On the Soul1, where he says that the speculative intellect says nothing about what is to be fled or pursued, cut off from contemplative happiness all delight and love, glossing as best they could the admirable delights of the tenth book of the Ethics2 But in truth they seem to have erred. For, speaking generally, intellectual delight follows upon the contemplation of excellent things by way of natural resultance: since upon the best operation, one that unites us with what is most natural to us as its object, delight necessarily follows, as is clear from the definition of delight in Book I of the Rhetoric3 Nor does the authority of Book III of the On the Soul militate against this, for it speaks of pursuit in the animal, not the natural, mode: that is, of an act of appetite as of something chosen, not as something naturally concomitant, as happens here. – Descending, however, to the matter at hand, this ambiguity has no place: since the beatific vision is neither practical nor speculative, but of a higher order, containing both eminently.
IV. Concerning active happiness, note here that certain thinkers, penetrating less deeply into the perfections of things, and therefore not attending to the fact that the perfection of the active part consists in acting, said that practical happiness consists in an act of the will. The text, however, for the reason given, places it in executive action—yet universal action, namely, in the governance of the universe. And rightly so: since the end of the practical is to operate.