FIFTH ARTICLE [I, Q. 16, Art. 5]

Whether God Is Truth?

Objection 1: It seems that God is not truth. For truth consists in the

intellect composing and dividing. But in God there is not composition

and division. Therefore in Him there is not truth.

Obj. 2: Further, truth, according to Augustine (De Vera Relig. xxxvi)

is a "likeness to the principle." But in God there is no likeness to

a principle. Therefore in God there is not truth.

Obj. 3: Further, whatever is said of God, is said of Him as of the

first cause of all things; thus the being of God is the cause of all

being; and His goodness the cause of all good. If therefore there is

truth in God, all truth will be from Him. But it is true that someone

sins. Therefore this will be from God; which is evidently false.

_On the contrary,_ Our Lord says, "I am the Way, the Truth, and the

Life" (John 14:6).

_I answer that,_ As said above (A. 1), truth is found in the

intellect according as it apprehends a thing as it is; and in things

according as they have being conformable to an intellect. This is to

the greatest degree found in God. For His being is not only conformed

to His intellect, but it is the very act of His intellect; and His act

of understanding is the measure and cause of every other being and of

every other intellect, and He Himself is His own existence and act of

understanding. Whence it follows not only that truth is in Him, but

that He is truth itself, and the sovereign and first truth.

Reply Obj. 1: Although in the divine intellect there is neither

composition nor division, yet in His simple act of intelligence He

judges of all things and knows all things complex; and thus there is

truth in His intellect.

Reply Obj. 2: The truth of our intellect is according to its

conformity with its principle, that is to say, to the things from

which it receives knowledge. The truth also of things is according to

their conformity with their principle, namely, the divine intellect.

Now this cannot be said, properly speaking, of divine truth; unless

perhaps in so far as truth is appropriated to the Son, Who has a

principle. But if we speak of divine truth in its essence, we cannot

understand this unless the affirmative must be resolved into the

negative, as when one says: "the Father is of Himself, because He is

not from another." Similarly, the divine truth can be called a

"likeness to the principle," inasmuch as His existence is not

dissimilar to His intellect.

Reply Obj. 3: Not-being and privation have no truth of themselves,

but only in the apprehension of the intellect. Now all apprehension

of the intellect is from God. Hence all the truth that exists in the

statement--"that a person commits fornication is true"--is entirely

from God. But to argue, "Therefore that this person fornicates is

from God", is a fallacy of Accident.

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Summa Theologica, Part I (Prima Pars) From the Complete American Edition · 第 137 / 722 题