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
The title, as is already clear from what has been said1, asks whether justice is formally in God.
In the body he does two things. First, he distinguishes justice into two species: namely, commutative and distributive. Second, he answers the question with two conclusions, according to the number of the species of justice.
II. The first conclusion is negative: In God there is no commutative justice. – It is proved by the authority of the Apostle: who is prior, etc.
The second is affirmative: In God there is distributive justice. – And it is proved. Distributive justice is that by which each is given what is due according to his dignity: therefore the order of the universe manifests God's justice; therefore in Him there is justice. – The consequence is proved by proportion: for just as the fitting order of a household shows justice in the one governing it, so the order of the universe, etc. And it is confirmed by the authority of Dionysius.
III. Concerning the first conclusion there is a doubt. First, because it seems false that in God there is no commutative justice. For the form of the divine judgment is accomplished according to commutative justice, when He recompenses and rewards merits, and inflicts punishments for sins; as the Author expressly says in IIa IIae, q. 61, art. 4, ad 1. – Second, because the proof does not seem sufficient. For to commutative justice belongs not only retribution, but also the prior act of giving itself: for not only buying, but also selling is regulated by commutative justice. And therefore from the negation of the second act in God, the negation of such justice does not seem sufficiently inferred: since it is preserved also in the first act.
IV. To these objections the answer is given in reverse order, that neither act of commutative justice has a place in God: for just as He cannot give in return for what has been received, so neither can He give in return for what is to be received; for nothing from creatures can accrue to Him. Both acts are likewise excluded from Him on the ground that no one can first give something to God: since, if no one can give first, it follows that no one can render an equivalent; and consequently that God cannot give in return for an equivalent received. And thus commutative justice, which establishes equality between what is given and what is accepted, cannot have a place in Him.
To the first, however, it is said that from this nothing can be gathered except that a certain mode of commutative justice is observed in the divine distribution, when He dispenses punishments for demerits and rewards for merits. But here it is intended that in God there is not commutative justice itself.
V. In response to the third, note the doctrine handed down in II Cont. Gent., chapters XXVIII and XXIX: and you will understand these things better, seeing that this is rather a fitting justice in relation to God than simply just.
Articulus II: Utrum iustitia Dei sit veritas
The title is clear from what has been said. — In the body, a single conclusion, answering the question in the affirmative: The justice of God is fittingly called truth.
It is proved. The truth of the intellect that rules and measures things consists in the adequation of things to the intellect; but justice consists in the conformity of works to the law with which they accord. Therefore the justice of God is fittingly called truth.
The antecedent, for its first part, is proved from the agreement and difference of truth in the intellect receiving from things and in the intellect causing things: agreement, indeed, because truth always consists in the adequation of intellect and thing; but difference, because in the caused intellect there is an adequation of the intellect to things, while in the causing intellect there is an adequation of things to the intellect. For the second part, because just as artifacts stand to art, so do just works stand to law. — The consequence, moreover, is proved: since God's justice makes an order in things conformable to His wisdom, which is the law of all.
And the whole demonstration is confirmed by the fact that the truth of justice is found even in us in this same way.
Articulus III: Utrum misericordia competat Deo
The title is already clear from its use1. – In the body he does two things: first he answers the question; second, he clarifies the answer. The responsive conclusion is: Mercy is in God to the highest degree, not according to the affection of passion, but according to its effect. – It is proved thus. To grieve over another's misery does not befit God; but to repel it befits him most of all. Therefore mercy belongs to God in the highest degree, not with respect to the affection, but with respect to the effect. The antecedent is explained as regards the term misery, namely that it may signify any defect whatsoever. And it is proved as regards the second part, thus. Defects are not removed except through the perfection of some being's goodness: therefore this pertains most of all to God, because he himself is the first origin of goodness. – But the consequence is proved: because the affection of mercy is sadness; while its effect is the driving away of another's misery. But the clarification consists in the differing relation of the perfection diffused by God to his goodness, justice, liberality, and mercy: and this is clear enough in the text itself.
Articulus IV: Utrum in omnibus operibus Dei sit misericordia et iustitia
The title is clear. – In the body there is a single conclusion, answering the question affirmatively, namely: In every work of God, mercy and justice must be found.
II. Concerning which he does three things. First, he extends the name of mercy by extending the name of misery to every defect. And he assigns the reason for this extension: because, since misery is opposed to happiness, misery can properly be found only in the rational creature, which alone is capable of happiness.
III. Second, he proves the conclusion with respect to justice, as follows. A debt arising from divine justice occurs in two ways, namely owed to God or to a creature; and neither can be omitted in any work of God. Therefore, in every work of God there must be justice. – The antecedent, as to its first part, is had from what was said in article I, ad 3. As to the second part, it is made clear: because God cannot make anything that would not befit His wisdom and goodness; and likewise, whatever He makes in created things, He disposes according to a fitting order and proportion.
Note here that the proposition set down in the text, neither can be omitted in any work of God, is not intended by the Author as it sounds: since in the work of creation, strictly speaking, no reason of what is owed can be found with respect to any creature, but only with respect to the divine wisdom and will, as you have in the reply to the fourth objection. But it is to be interpreted with regard to the works of providence and governance; and to intimate this, when that proposition is made manifest in the text, it is notably said, whatever God does in created things; as if to say that whatever he does creation being presupposed.
IV. The conclusion is then proved with respect to mercy, as follows. The work of divine justice always presupposes the work of mercy and is founded upon it; therefore in every work of God mercy appears, with respect to its first root. – The antecedent is proved: because the debt is reduced to something bestowed out of the divine goodness alone. This is proved: because otherwise one would proceed to infinity. And it is explained by way of exemplar.
V. Third, because from this argument it seemed that mercy would concur in the works of God as a remote cause, he therefore shows that it concurs more eminently than justice. And this in two ways. First, because a primary cause influences more powerfully than a secondary one: and thus the force of mercy both is preserved and operates more powerfully in all that follows. – Second, from the effect: because God dispenses to some creature what is owed to it more generously than the proportion of the thing requires; and this from the abundance of his goodness. That this is so is evident: for less than what divine goodness in fact bestows would suffice for preserving the order of justice.