Thomas Aquinas, Summa Theologiae

Objection 1: It seems that those who see the divine essence, comprehend God. For the Apostle says (Phil. 3:12): "But I follow after, if I may by any means comprehend ." But the Apostle did not follow in vain; for he said (1 Cor. 9:26): "I . . . so run, not as at an uncertainty." Therefore he comprehended; and in the same way, others also, whom he invites to do the same, saying: "So run that you may comprehend."

Objection 2: Further, Augustine says (De Vid. Deum, Ep. cxlvii): "That is comprehended which is so seen as a whole, that nothing of it is hidden from the seer." But if God is seen in His essence, He is seen whole, and nothing of Him is hidden from the seer, since God is simple. Therefore whoever sees His essence, comprehends Him.

Objection 3: Further, if we say that He is seen as a "whole," but not "wholly," it may be contrarily urged that "wholly" refers either to the mode of the seer, or to the mode of the thing seen. But he who sees the essence of God, sees Him wholly, if the mode of the thing seen is considered; forasmuch as he sees Him as He is; also, likewise, he sees Him wholly if the mode of the seer is meant, forasmuch as the intellect will with its full power see the Divine essence. Therefore all who see the essence of God see Him wholly; therefore they comprehend Him.

On the contrary, It is written: "O most mighty, great, and powerful, the Lord of hosts is Thy Name. Great in counsel, and incomprehensible in thought" (Jer. 32:18,19). Therefore He cannot be comprehended.

I answer that, It is impossible for any created intellect to comprehend God; yet "for the mind to attain to God in some degree is great beatitude," as Augustine says (De Verb. Dim., Serm. xxxvii).

In proof of this we must consider that what is comprehended is perfectly known; and that is perfectly known which is known so far as it can be known. Thus, if anything which is capable of scientific demonstration is held only by an opinion resting on a probably proof, it is not comprehended; as, for instance, if anyone knows by scientific demonstration that a triangle has three angles equal to two right angles, he comprehends that truth; whereas if anyone accepts it as a probable opinion because wise men or most men teach it, he cannot be said to comprehend the thing itself, because he does not attain to that perfect mode of knowledge of which it is intrinsically capable. But no created intellect can attain to that perfect mode of the knowledge of the Divine intellect whereof it is intrinsically capable. Which thus appears---Everything is knowable according to its actuality. But God, whose being is infinite, as was shown above (Question 7) is infinitely knowable. Now no created intellect can know God infinitely. For the created intellect knows the Divine essence more or less perfectly in proportion as it receives a greater or lesser light of glory. Since therefore the created light of glory received into any created intellect cannot be infinite, it is clearly impossible for any created intellect to know God in an infinite degree. Hence it is impossible that it should comprehend God.

Reply to Objection 1: "Comprehension" is twofold: in one sense it is taken strictly and properly, according as something is included in the one comprehending; and thus in no way is God comprehended either by intellect, or in any other way; forasmuch as He is infinite and cannot be included in any finite being; so that no finite being can contain Him infinitely, in the degree of His own infinity. In this sense we now take comprehension. But in another sense "comprehension" is taken more largely as opposed to "non-attainment"; for he who attains to anyone is said to comprehend him when he attains to him. And in this sense God is comprehended by the blessed, according to the words, "I held him, and I will not let him go" (Cant 3:4); in this sense also are to be understood the words quoted from the Apostle concerning comprehension. And in this way "comprehension" is one of the three prerogatives of the soul, responding to hope, as vision responds to faith, and fruition responds to charity. For even among ourselves not everything seen is held or possessed, forasmuch as things either appear sometimes afar off, or they are not in our power of attainment. Neither, again, do we always enjoy what we possess; either because we find no pleasure in them, or because such things are not the ultimate end of our desire, so as to satisfy and quell it. But the blessed possess these three things in God; because they see Him, and in seeing Him, possess Him as present, having the power to see Him always; and possessing Him, they enjoy Him as the ultimate fulfilment of desire.

Reply to Objection 2: God is called incomprehensible not because anything of Him is not seen; but because He is not seen as perfectly as He is capable of being seen; thus when any demonstrable proposition is known by probable reason only, it does not follow that any part of it is unknown, either the subject, or the predicate, or the composition; but that it is not as perfectly known as it is capable of being known. Hence Augustine, in his definition of comprehension, says the whole is comprehended when it is seen in such a way that nothing of it is hidden from the seer, or when its boundaries can be completely viewed or traced; for the boundaries of a thing are said to be completely surveyed when the end of the knowledge of it is attained.

Reply to Objection 3: The word "wholly" denotes a mode of the object; not that the whole object does not come under knowledge, but that the mode of the object is not the mode of the one who knows. Therefore he who sees God's essence, sees in Him that He exists infinitely, and is infinitely knowable; nevertheless, this infinite mode does not extend to enable the knower to know infinitely; thus, for instance, a person can have a probable opinion that a proposition is demonstrable, although he himself does not know it as demonstrated.

Articulus 7

Argumentum 1

Ad septimum sic proceditur. Videtur quod videntes deum per essentiam ipsum comprehendant.

Dicit enim apostolus, philipp. III, sequor autem si quo modo comprehendam.

Non autem frustra sequebatur, dicit enim ipse, I Cor. IX, sic curro, non quasi in incertum.

Ergo ipse comprehendit, et eadem ratione alii, quos ad hoc invitat, dicens, sic currite, ut comprehendatis.

Argumentum 2

Praeterea, ut dicit Augustinus in libro de videndo deum ad Paulinam, illud comprehenditur, quod ita totum videtur, ut nihil eius lateat videntem. Sed si deus per essentiam videtur, totus videtur, et nihil eius latet videntem; cum deus sit simplex.

Ergo a quocumque videtur per essentiam, comprehenditur.

Argumentum 3

Si dicatur quod videtur totus, sed non totaliter, contra, totaliter vel dicit modum videntis, vel modum rei visae. Sed ille qui videt deum per essentiam, videt eum totaliter, si significetur modus rei visae, quia videt eum sicuti est, ut dictum est.

Similiter videt eum totaliter, si significetur modus videntis, quia tota virtute sua intellectus dei essentiam videbit. Quilibet ergo videns deum per essentiam, totaliter eum videbit. Ergo eum comprehendet.

Sed Contra

Sed contra est quod dicitur Ierem. XXXII, fortissime, magne, potens, dominus exercituum nomen tibi; magnus consilio, et incomprehensibilis cogitatu.

Ergo comprehendi non potest.

Corpus

Respondeo dicendum quod comprehendere deum impossibile est cuicumque intellectui creato, attingere vero mente deum qualitercumque, magna est beatitudo, ut dicit Augustinus.

Ad cuius evidentiam, sciendum est quod illud comprehenditur, quod perfecte cognoscitur. Perfecte autem cognoscitur, quod tantum cognoscitur, quantum est cognoscibile.

Unde si id quod est cognoscibile per scientiam demonstrativam, opinione teneatur ex aliqua ratione probabili concepta, non comprehenditur. Puta, si hoc quod est triangulum habere tres angulos aequales duobus rectis, aliquis sciat per demonstrationem, comprehendit illud, si vero aliquis eius opinionem accipiat probabiliter, per hoc quod a sapientibus vel pluribus ita dicitur, non comprehendet ipsum, quia non pertingit ad illum perfectum modum cognitionis, quo cognoscibilis est.

Nullus autem intellectus creatus pertingere potest ad illum perfectum modum cognitionis divinae essentiae, quo cognoscibilis est. Quod sic patet. Unumquodque enim sic cognoscibile est, secundum quod est ens actu. Deus igitur, cuius esse est infinitum, ut supra ostensum est, infinite cognoscibilis est. Nullus autem intellectus creatus potest deum infinite cognoscere. Intantum enim intellectus creatus divinam essentiam perfectius vel minus perfecte cognoscit, inquantum maiori vel minori lumine gloriae perfunditur. Cum igitur lumen gloriae creatum, in quocumque intellectu creato receptum, non possit esse infinitum, impossibile est quod aliquis intellectus creatus deum infinite cognoscat. Unde impossibile est quod deum comprehendat.

Ad 1

Ad primum ergo dicendum quod comprehensio dicitur dupliciter.

Uno modo, stricte et proprie, secundum quod aliquid includitur in comprehendente. Et sic nullo modo deus comprehenditur, nec intellectu nec aliquo alio, quia, cum sit infinitus, nullo finito includi potest, ut aliquid finitum eum infinite capiat, sicut ipse infinite est. Et sic de comprehensione nunc quaeritur. Alio modo comprehensio largius sumitur, secundum quod comprehensio insecutioni opponitur. Qui enim attingit aliquem, quando iam tenet ipsum, comprehendere eum dicitur. Et sic deus comprehenditur a beatis, secundum illud Cant. III, tenui eum, nec dimittam.

Et sic intelliguntur auctoritates apostoli de comprehensione.

Et hoc modo comprehensio est una de tribus dotibus animae, quae respondet spei; sicut visio fidei, et fruitio caritati. Non enim, apud nos, omne quod videtur, iam tenetur vel habetur, quia videntur interdum distantia, vel quae non sunt in potestate nostra. Neque iterum omnibus quae habemus, fruimur, vel quia non delectamur in eis; vel quia non sunt ultimus finis desiderii nostri, ut desiderium nostrum impleant et quietent. Sed haec tria habent beati in deo, quia et vident ipsum; et videndo, tenent sibi praesentem, in potestate habentes semper eum videre; et tenentes, fruuntur sicut ultimo fine desiderium implente.

Ad 2

Ad secundum dicendum quod non propter hoc deus incomprehensibilis dicitur, quasi aliquid eius sit quod non videatur, sed quia non ita perfecte videtur, sicut visibilis est. Sicut cum aliqua demonstrabilis propositio per aliquam probabilem rationem cognoscitur, non est aliquid eius quod non cognoscatur, nec subiectum, nec praedicatum, nec compositio, sed tota non ita perfecte cognoscitur, sicut cognoscibilis est.

Unde Augustinus, definiendo comprehensionem, dicit quod totum comprehenditur videndo, quod ita videtur, ut nihil eius lateat videntem; aut cuius fines circumspici possunt, tunc enim fines alicuius circumspiciuntur, quando ad finem in modo cognoscendi illam rem pervenitur.

Ad 3

Ad tertium dicendum quod totaliter dicit modum obiecti, non quidem ita quod totus modus obiecti non cadat sub cognitione; sed quia modus obiecti non est modus cognoscentis. Qui igitur videt deum per essentiam, videt hoc in eo, quod infinite existit, et infinite cognoscibilis est, sed hic infinitus modus non competit ei, ut scilicet ipse infinite cognoscat, sicut aliquis probabiliter scire potest aliquam propositionem esse demonstrabilem, licet ipse eam demonstrative non cognoscat.