Nicene and Post-Nicene Fathers, Vol. III:
Moral Treatises of St. Augustin: Section 37

37. Likewise, touching that which is written, “A son which receiveth the word shall be far from destruction: but receiving, he receiveth it for himself, and no falsehood proceedeth out of his mouth:” 2366 some one may say, that what is here set down, “A son which receiveth the word,” is to be taken for no other than the word of God, which is truth. Therefore, “A son receiving the truth shall be far from destruction,” refers to that which is written, “Thou wilt destroy all that speak leasing.” But when it follows, “Receiving he receiveth for himself,” what other doth this insinuate than what the Apostle saith, “But let every man prove his own work, and then he shall have glorying in himp. 474 self and not in another?” 2367 For he that receiveth the word, that is, truth, not for himself, but for men-pleasing, keepeth it not when he sees they can be pleased by a lie. But whoso receiveth it for himself, no falsehood proceedeth out of his mouth: because even when the way to please men is to lie, that man lieth not, who receiving the truth not thereby to please them but to please God, hath received it for himself. Therefore there is no reason why it should be said here He will destroy all who speak leasing, but not all leasing: because all lies, universally, are cut off in this saying, “And no falsehood proceedeth out of his mouth.” But another saith, it is to be so taken as the Apostle Paul took our Lord’s saying, “But I say unto you, Swear not at all.” 2368 For here also all swearing is cut off; but from the mouth of the heart, that it should never be done with approbation of the will, but through necessity of the weakness of another; that is, “from the evil” of another, when it shows that he cannot otherwise be got to believe what is said, unless faith be wrought by an oath; or, from that “evil” of our own, that while as yet involved in the skins of this mortality we are not able to show our heart: which thing were we able to do, of swearing there were no need. Though moreover in this whole sentence, if the saying, “A son receiving the word shall be far from destruction,” be said of none other than that Truth, 2369 by Whom all things were made, which remaineth ever incommutable; then, because the doctrine of Religion strives to bring men to the contemplation of this Truth, it may seem that the saying, “And no falsehood proceedeth out of his mouth,” is said to this purpose, that he speaketh no falsehood that pertaineth to doctrine. Which sort of lie is upon no compensation whatever to be gone into, and is utterly and before all to be eschewed. Or if the saying, “No falsehood,” is absurdly taken if it be not referred to every lie, the saying, “From his mouth,” should, as was argued above, be taken to mean the mouth of the heart, in the opinion of him who accounts that sometimes one may tell a lie.

Footnotes

Prov. 29.27Prov. xxix. 27. Lat. Not in the Hebrew, but LXX. xxiv. 23. λόγον φυλασσόμενος υἱὸ·ς ἀπωλείας ἐκτὸς ἔσται δεχόμενος δὲ ἐδέξατο αὐτόν.  Μηδὲν ψεῦδος ἀπὸ γλώσσης βασιλέως λεγέσθω, καὶ οὐδὲν ψεῦδος ἀπὸ γλώσσης αὐτοῦ οὐ μὴ ἐξέλθῃ

Gal. 6.4Gal. vi. 4

Matt. 5.34

Or “of Him who is Truth itself.”