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
The title is clear: for it asks whether being-in is had formally; since1 it is already established that all things are in God virtually.
II. In the body there is a single conclusion, answering the question in the affirmative: In God there is love. – It is proved. The motion of the will, and of any appetitive power, tends toward good in itself, but toward evil through something else: therefore the first motion of the will, and of any appetitive power, is toward good in common: therefore the first act of the will and of appetite is love: therefore in whatever there is will or appetite, there must be love: therefore it is necessary to posit love in God.
The antecedent is explained: because evil does not fall under appetite except insofar as it is opposed to good. – The first consequence, as regards its first part, namely that the first act tends toward good, is proved from the fact that what is per se is prior to what is per aliud. As regards the second part, namely in common: because what is more common is naturally prior. A sign of this relevant to our purpose is that the intellect regards common truth before particular truths. – The second consequence is proved from the difference between the object of love and the objects of the other acts of will and appetite: because love is with respect to good in common, whereas desire, hope, and delight are with respect to a particular good, say one present or future. And it is confirmed by this, that all other appetitive movements arise from love: which is shown inductively in the acts of desire, joy, hatred, sadness, etc. – The third consequence is proved: because when the first is removed, the others are removed. – The fourth is proved: because in God there is will.
III. Concerning the foregoing, two things must be noted. First, that when the text says that love regards the good in common, the expression in common does not signify the same thing as universal: rather, it signifies the same thing as absolutely. For every love is of the good, without any further limitation: but delight is of a good conjoined, etc. I say this, however, because the text, up to the final inference, speaks also of love which is in the sensitive appetite, which, as is evident, does not attain to the good according to a universal sense, but absolutely. Nor, however, is anything conceded by this to the force of that proof, that what is more common is naturally prior: since the good absolutely is related to the good with a certain condition proportionally, as the common to the proper, or as the more common to the less common.
Second, that when the text says that love is the first act of the will and of appetite, by the name "appetite" he understands the whole breadth of the appetitive power in any nature, and not each appetitive power. And by this the objection concerning the first act of the irascible is excluded. For although its first act is not love but hope, nevertheless the first act of the whole sensitive appetite, divided into concupiscible and irascible, is love.
Articulus II: Utrum Deus omnia amet
The title is clear. - In the body, there is a single conclusion: God loves all existing things; yet not in the way we do. This conclusion, as regards its first part, is proved thus. All existing things, insofar as they are, are good; and thus, what they have insofar as they are is willed by God: therefore to every existing thing God wills some good: therefore God loves all things that are. - The antecedent, as regards its first part, is proved: because esse itself, and every perfection of a thing, is a certain goodness. As regards the second part, however: because the will of God is the cause of things. The first inference needs no proof. The second, however, is proved from this, that to love is nothing other than to will some good to someone. As regards the second part, however, the conclusion is made manifest. Because we love, moved by the goodness of the thing loved: but God loves by creating and infusing the goodness that He loves.
Articulus III: Utrum Deus aequaliter diligat omnia
The title is clear. — In the body he does two things. First, he distinguishes that loving unequally happens in two ways. And he proves the distinction, from the fact that to love is to will the good to someone. — Second, he answers the question with two conclusions, according to the aforementioned members of the distinction.
The first conclusion is: God, on the side of the act of loving, loves all things equally. — It is proved. He loves with one simple act, and the act of the will always remaining the same: therefore equally.
The second conclusion is: God, on the side of the good willed and loved, loves some things more than others. — It is proved. If God did not will a greater good for one thing than for another, there would be nothing better than anything else: this is manifestly false: therefore. — The consequence is proved: because the love of God is the cause of the goodness of things.
Articulus IV: An Deus semper magis diligat meliora
The title is clear. – In the body, one conclusion, answering the question affirmatively: God loves the better things more. It is proved. The will of God is the cause of goodness in things: therefore for God to love something more is nothing other than to will it a greater good: therefore things are better from this, that God wills them a greater good: therefore He loves the better ones more. II. In response to the fifth, the words placed at the end raise a doubt, namely that the predestined sinner, for some time, is neither good nor evil. For this opinion seems both false and contrary to the doctrine of the Author. Since both angel and man, according to him, were created in grace1; and every man contracts original sin2. And even granted that they were not created in grace, they would have been neither good nor evil for only an instant, and not for any time. Therefore these words appear altogether false. III. To this there are three replies. First, that these words are true of the possible, whatever may be the case de facto. And by the name time is understood every measure of duration, even instantaneous. For both angel and man could at some time, namely in the first instant, be neither morally good nor morally evil. Second, that they are verified of personal moral goodness and malice, that is, through one's own act. For an infant, though he is evil by the sin of nature, is nevertheless neither good nor evil by his own work. Third, that these words are simply true, and to be understood absolutely, without any restriction. And although the predestined sinner, after he had being (esse), was always good or evil; yet at some time, namely throughout the infinite time during which he did not exist, he was neither good nor evil. – And this exposition is more formal, consonant with the purpose, and beyond question. For the letter intends to teach that it is not surprising that the predestined sinner should be for some time worse and less loved, from the fact that for some time he was not loved in any way, namely when he did not exist: since then he was neither good nor evil, speaking universally of good and evil, as is evident.