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
The title is sufficiently clear, from the common usage of the terms in the matter of the Trinity. And ly sit denotes what the question is: whether, by reason of its own signification, it is a personal name, or not. For it is not asked whether it can supposit for a person, or whether it is a personal name by accommodation, but simply: in the divine nonetheless, that is, when it is predicated of God.
II. In the body he does three things. First, he proposes the responsive conclusion to the question, namely: The name "Word," taken properly in God, is personal, and in no way essential. – Second, he immediately explains those terms of the conclusion, taken properly in God; third, he proves the conclusion, there: But He Himself is the concept of the heart.1
III. With respect to second, in order to explain "word" taken properly, he distinguishes the name of the word and orders its modes. He distinguishes, indeed, that it is taken in two ways: namely, properly, and metaphorically. And again, taken properly, it is taken in three ways. And thus, by uniting all the modes, it is said in four ways: in the first three ways properly, and in the fourth by similitude. First, therefore, for the word in vocal utterance; second, in the cogitative power; third, in the intellect; fourth, however, for some deed that has been signified, commanded, or effected by the word. – He then orders, first, the word of the heart, second, of the mouth, third, of the cogitative power, placing them; and proving the order of the first from this, that exterior vocal sound has the character of a word only because it signifies the interior concept of the mind.
But to explain ly in divinis, he says that the Word in God is taken for the word of the intellect. And he confirms this by the authority of Augustine. – On these ways of taking verbum, you will find written at length and clearly in Qq. de Ver., qu. IV, art. 1 and 2; and in I Sent., dist. XXVII, qu. II, art. 1, 2. Therefore see there.
IV. Concerning the order of the words set down in the text, there is doubt as to what kind of order it is—whether with respect to us, or according to itself. That it is not with respect to us is evident from this: that, according to this order, not the word of the heart but the word of the voice must hold the first place, as is also intimated at the beginning of the text. But that it is not according to nature appears from this: that in this order the word of the cogitative power claims for itself the second place, since it is clear that the vocal word depends upon imagination. And so, whatever order may be meant, the word of the mouth seems badly placed second: for by the order of nature it belongs to it to be last, while with respect to us it is first.
V. To this it is said that the order assigned is the order of nature among the intentions signified by the name word. For the evidence of this, know that there are two canons in matters of this kind. The first is: every name is said formally before it is said by extrinsic denomination; as is clear inductively. The other is: every name said formally of several things is said first of that on which another depends than of the thing dependent upon it. And this too is clear inductively.
The Word, therefore, since it is preserved formally only in the word of the heart and of the mouth, but causally in the cogitative power, is accordingly, in accordance with the first rule, said lastly of the word of the cogitative power. And to intimate this, the text said, imagination is called a word, signifying that it is called a word in the cogitative power for the reason that it is an image of the Word, though a causal one.
But since the formal character of the word in the intellect exists without dependence on the spoken word, while in speech it exists with dependence on the word of the heart, therefore the word of the heart is discussed before the spoken word: formally, however, as was said, and not by extrinsic denomination, as Durandus thought. This is evident from the fact that the voice had the name "word" before the concept of the mind did: for in that prior usage, the voice was a word, and the formal character of a word in the concept was unknown. Therefore the voice did not take its appellation "word" from the word of the heart. – Moreover, the voice is an expressive sign not by extrinsic denomination but formally, just as Socrates is white. But the formal character of the word in the voice is to be an expressive or manifestative sign of the concept of one mind to another, as is said in the text: just as the formal character of the word in the concept is to be an expressive sign of habitual knowledge to oneself, as is said in Qq. de Ver.2 Therefore the significative voice is formally a word, just as it is formally expressive.
VI. But in response to the objection to the contrary 3, it is said that the order of nature among the intentions of a manifold name is attended neither according to the order of the things in which those intentions are realized, nor according to the order of those intentions in their natural being (esse naturae): for the sun, although prior to what it heats, and the sun's causality naturally prior to the heat caused by it, is nevertheless not said to be hot before the thing heated, but rather the reverse. Rather, it is attended according to the relation of the intentions themselves in that one is included in another and not conversely. Thus do the formal intention and that by extrinsic denomination stand to one another. And therefore, although the causality of the cogitative power, whereby the word is said to be in it, is prior to the vocal word, the latter nevertheless receives its predication later.
VII. As to the third4, the conclusion is proved as follows. "Word" in God signifies a concept of the intellect; therefore it signifies something proceeding from another; therefore something personal; therefore it is not taken essentially, but personally only. – The first inference is proved: because it belongs to the very notion of the concept of the heart that it proceed from another, namely from the knowledge of the one conceiving. The second, however, is proved: because the divine persons are distinguished according to origin. The third is self-evident.
VIII. Concerning this argument and conclusion, a doubt arises on three grounds. First, because "to proceed" abstracts from a real procession and a procession according to reason. And likewise ly from another can be understood in both ways, namely from another according to reality, or according to reason. And yet the text infers both procession and real otherness. – Second (and this is a confirmation of the preceding), because of many counterinstances. For "to understand," "to love," and whatever else is similar, signify something proceeding from another, say from the intellect or the will, etc.; and yet it does not follow: Therefore such are personal names in the divine. – Third (and this is an augmentation of the preceding), because of the Author himself, who both in the Questions on Truth5, and in I Sentences6, where above7, on account of what we have adduced, holds that this argument adduced in the text does not conclude; and he maintains the opposite of the conclusion here proven, saying that word is sometimes a personal, sometimes an essential name.
IX. To make this doubt evident, we must first speak of the thing itself, and then8 of the Author. As to the thing, know two points. First, that "according to reason" is a diminishing condition, just as "painted" or "dead" (for to be moved according to reason is not to be moved); therefore to proceed according to reason is not to proceed, but is to be understood as proceeding, that is, in the manner of a procession. And for this reason, when procession is the subject of discussion, what is real must be understood; just as when we speak of motion and other things that are diminished by reason. Otherwise all things would be uncertain.
Know secondly, that it is one thing to signify something proceeding from another, and another thing to signify something in the manner of a thing proceeding from another. For in the first, what is signified is said to proceed from another; but in the second, the thing signified is understood and signified as proceeding, or in the manner of a thing proceeding from another. Between these two, moreover, there is a greater distance than between heaven and earth: for it is as great as that between being (esse) and being signified. For in the first, the thing signified is from another; but in the second, it is signified as from another.
X. These points standing, it is answered that the propositions assumed in the text are not to be distinguished: for they expressly signify that procession falls upon the thing signified. The argument therefore stands on this. The name "Word," taken properly in the intellect, signifies a concept proceeding from another, such that the procession determines the concept with respect to the thing: since otherwise there would be no procession. And this is said properly of God. Therefore it is saved there in both respects: otherwise it would not be said properly. Therefore it is a personal name: because there nothing is from another except a person, although many things are understood as being from another.
And by this the answer to the objections is clear. For "to love" does not signify something proceeding from another, but signifies something in the manner of a thing proceeding from another. And the same reasoning applies to the rest of this kind.
XI. As to the Author9, it is said that, as appears to one who attentively examines his books, he gradually arrived in this question at the perfection of truth. For in Book I of the Sentences, he followed the opinion of those who, considering the name "Word" just as the name "love," said that it is sometimes essential and sometimes personal. Later, in the Questions On Truth, he inclined to the other side, namely that it is said personally; yet not without fear of the other position, as is clear from the fact that he answers the arguments on both sides, embracing the one that seemed the more reasonable. Finally, in this passage, he asserted the other side, namely that it is said personally, with an express refutation of the other, namely that it is in no way essential. And this because he saw that all those things which had once made the matter doubtful cease on this one account, namely that the name "Word" signifies something proceeding from another; by this he distinguishes it from those terms that signify by way of a principle. For against this no objection militates, and in this no distinction has a place, as is clear from what has been said10. Nor did he assume this without proof, but proved it from the very account of the thing signified: Itself, he says, the concept of the heart has, from its own account, that it proceeds from another. It is therefore not something essential: since in the account of nothing essential is it contained, whether intrinsically or as a necessary concomitant, that it proceed from another. – Nor does this detract from the dignity of the Doctor: for it is natural for the human intellect to be perfected in the course of time. He therefore retracted the aforesaid, not by mentioning that he had once thought otherwise, but by rejecting the opinion he had held.
XII. In response to the first objection, note that that conditional, if the Word of God is said metaphorically, the Word of God must be posited as said properly, does not hold on account of its form, but on account of its matter. For, as is stated in the text, if the Word of God is posited metaphorically, it is posited either as manifested by the Word of God, or as manifesting the Word of God; for in these two ways it is said metaphorically. In both cases, however, the Word taken properly is implied, and consequently personally, as was shown in the text. For there is nothing in the notion of a word that implies imperfection, but only being from another, etc.
XIII. In reply to the second, note that, when it is said in the text that understanding is related to the intellect in act as esse is to ens in act, this is not a figurative manner of speaking, but rather an expressive one: as if he were saying that, just as esse in common is to ens in act in common, so such esse, that is, understanding, is to such ens in act, that is, intellect in act. For it has been made clear above11 that to cognize something is to be that thing; and that in things cognizing in potency, the cognitive power is first in potency the very thing cognized, then in an intermediate way between potency and act, and finally it is that very thing; and only then is it called actually cognizing. Nor is it an obstacle that understanding is called an action: both because it is immanent, as is said in the text; and because, according to the truth of the matter, it has more of being signified than of being an action.
XIV. In response to the third, it is doubtful whether the divine Word proceeds from all things that are in the Father's knowledge, namely the Father, the Son, and the Holy Spirit, and all creatures. But since this is treated more deliberately in the third article of this question, it will be defined there.12