Thomas Aquinas, Summa Theologiae

Objection 1: It seems that affirmative propositions cannot be formed about God. For Dionysius says (Coel. Hier. ii) that "negations about God are true; but affirmations are vague."

Objection 2: Further, Boethius says (De Trin. ii) that "a simple form cannot be a subject." But God is the most absolutely simple form, as shown (Question 3): therefore He cannot be a subject. But everything about which an affirmative proposition is made is taken as a subject. Therefore an affirmative proposition cannot be formed about God.

Objection 3: Further, every intellect is false which understands a thing otherwise than as it is. But God has existence without any composition as shown above (Question 3, Article 7). Therefore since every affirmative intellect understands something as compound, it follows that a true affirmative proposition about God cannot be made.

On the contrary, What is of faith cannot be false. But some affirmative propositions are of faith; as that God is Three and One; and that He is omnipotent. Therefore true affirmative propositions can be formed about God.

I answer that, True affirmative propositions can be formed about God. To prove this we must know that in every true affirmative proposition the predicate and the subject signify in some way the same thing in reality, and different things in idea. And this appears to be the case both in propositions which have an accidental predicate, and in those which have an essential predicate. For it is manifest that "man" and "white" are the same in subject, and different in idea; for the idea of man is one thing, and that of whiteness is another. The same applies when I say, "man is an animal"; since the same thing which is man is truly animal; for in the same "suppositum" there is sensible nature by reason of which he is called animal, and the rational nature by reason of which he is called man; hence here again predicate and subject are the same as to "suppositum," but different as to idea. But in propositions where one same thing is predicated of itself, the same rule in some way applies, inasmuch as the intellect draws to the "suppositum" what it places in the subject; and what it places in the predicate it draws to the nature of the form existing in the "suppositum"; according to the saying that "predicates are to be taken formally, and subjects materially." To this diversity in idea corresponds the plurality of predicate and subject, while the intellect signifies the identity of the thing by the composition itself.

God, however, as considered in Himself, is altogether one and simple, yet our intellect knows Him by different conceptions because it cannot see Him as He is in Himself. Nevertheless, although it understands Him under different conceptions, it knows that one and the same simple object corresponds to its conceptions. Therefore the plurality of predicate and subject represents the plurality of idea; and the intellect represents the unity by composition.

Reply to Objection 1: Dionysius says that the affirmations about God are vague or, according to another translation, "incongruous," inasmuch as no name can be applied to God according to its mode of signification.

Reply to Objection 2: Our intellect cannot comprehend simple subsisting forms, as they really are in themselves; but it apprehends them as compound things in which there is something taken as subject and something that is inherent. Therefore it apprehends the simple form as a subject, and attributes something else to it.

Reply to Objection 3: This proposition, "The intellect understanding anything otherwise than it is, is false," can be taken in two senses, accordingly as this adverb "otherwise" determines the word "understanding" on the part of the thing understood, or on the part of the one who understands. Taken as referring to the thing understood, the proposition is true, and the meaning is: Any intellect which understands that the thing is otherwise than it is, is false. But this does not hold in the present case; because our intellect, when forming a proposition about God, does not affirm that He is composite, but that He is simple. But taken as referring to the one who understands, the proposition is false. For the mode of the intellect in understanding is different from the mode of the thing in its essence. Since it is clear that our intellect understands material things below itself in an immaterial manner; not that it understands them to be immaterial things; but its manner of understanding is immaterial. Likewise, when it understands simple things above itself, it understands them according to its own mode, which is in a composite manner; yet not so as to understand them to be composite things. And thus our intellect is not false in forming composition in its ideas concerning God.

Articulus 12

Argumentum 1

Ad duodecimum sic proceditur. Videtur quod propositiones affirmativae non possunt formari de deo.

Dicit enim dionysius, II cap. Cael. Hier., quod negationes de deo sunt verae, affirmationes autem incompactae.

Argumentum 2

Praeterea, boetius dicit, in libro de Trin., quod forma simplex subiectum esse non potest.

Sed deus maxime est forma simplex, ut supra ostensum est.

Ergo non potest esse subiectum. Sed omne illud de quo propositio affirmativa formatur, accipitur ut subiectum. Ergo de deo propositio affirmativa formari non potest.

Argumentum 3

Praeterea, omnis intellectus intelligens rem aliter quam sit, est falsus. Sed deus habet esse absque omni compositione, ut supra probatum est.

Cum igitur omnis intellectus affirmativus intelligat aliquid cum compositione, videtur quod propositio affirmativa vere de deo formari non possit.

Sed Contra

Sed contra est quod fidei non subest falsum. Sed propositiones quaedam affirmativae subduntur fidei, utpote quod deus est trinus et unus, et quod est omnipotens. Ergo propositiones affirmativae possunt vere formari de deo.

Corpus

Respondeo dicendum quod propositiones affirmativae possunt vere formari de deo. Ad cuius evidentiam, sciendum est quod in qualibet propositione affirmativa vera, oportet quod praedicatum et subiectum significent idem secundum rem aliquo modo, et diversum secundum rationem. Et hoc patet tam in propositionibus quae sunt de praedicato accidentali, quam in illis quae sunt de praedicato substantiali. Manifestum est enim quod homo et albus sunt idem subiecto, et differunt ratione, alia enim est ratio hominis, et alia ratio albi. Et similiter cum dico homo est animal, illud enim ipsum quod est homo, vere animal est; in eodem enim supposito est et natura sensibilis, a qua dicitur animal, et rationalis, a qua dicitur homo. Unde hic etiam praedicatum et subiectum sunt idem supposito, sed diversa ratione. Sed et in propositionibus in quibus idem praedicatur de seipso, hoc aliquo modo invenitur; inquantum intellectus id quod ponit ex parte subiecti, trahit ad partem suppositi, quod vero ponit ex parte praedicati, trahit ad naturam formae in supposito existentis, secundum quod dicitur quod praedicata tenentur formaliter, et subiecta materialiter. Huic vero diversitati quae est secundum rationem, respondet pluralitas praedicati et subiecti, identitatem vero rei significat intellectus per ipsam compositionem.

Deus autem, in se consideratus, est omnino unus et simplex, sed tamen intellectus noster secundum diversas conceptiones ipsum cognoscit, eo quod non potest ipsum ut in seipso est, videre.

Sed tamen, quamvis intelligat ipsum sub diversis conceptionibus, cognoscit tamen quod omnibus suis conceptionibus respondet una et eadem res simpliciter. Hanc ergo pluralitatem quae est secundum rationem, repraesentat per pluralitatem praedicati et subiecti, unitatem vero repraesentat intellectus per compositionem.

Ad 1

Ad primum ergo dicendum quod dionysius dicit affirmationes de deo esse incompactas, vel inconvenientes secundum aliam translationem, inquantum nullum nomen deo competit secundum modum significandi, ut supra dictum est.

Ad 2

Ad secundum dicendum quod intellectus noster non potest formas simplices subsistentes secundum quod in seipsis sunt, apprehendere, sed apprehendit eas secundum modum compositorum, in quibus est aliquid quod subiicitur, et est aliquid quod inest.

Et ideo apprehendit formam simplicem in ratione subiecti, et attribuit ei aliquid.

Ad 3

Ad tertium dicendum quod haec propositio, intellectus intelligens rem aliter quam sit, est falsus, est duplex, ex eo quod hoc adverbium aliter potest determinare hoc verbum intelligit ex parte intellecti, vel ex parte intelligentis. Si ex parte intellecti, sic propositio vera est, et est sensus, quicumque intellectus intelligit rem esse aliter quam sit, falsus est. Sed hoc non habet locum in proposito, quia intellectus noster, formans propositionem de deo, non dicit eum esse compositum, sed simplicem. Si vero ex parte intelligentis, sic propositio falsa est. Alius est enim modus intellectus in intelligendo, quam rei in essendo.

Manifestum est enim quod intellectus noster res materiales infra se existentes intelligit immaterialiter; non quod intelligat eas esse immateriales, sed habet modum immaterialem in intelligendo. Et similiter, cum intelligit simplicia quae sunt supra se, intelligit ea secundum modum suum, scilicet composite, non tamen ita quod intelligat ea esse composita. Et sic intellectus noster non est falsus, formans compositionem de deo.