Answer to Eunomius' Second Book
And the futility of such assertions may be seen also by this. For as the natures of the elements, which are the work of the Creator, appear alike to all, and there is no difference to human sense in men's experience of fire, or air, or water, but the nature of each is one and unchanging, working in the same way, and suffering no modification from the differences of those who partake of it, so also the imposition of names, if applied to things by God, would have been the same for all. But, in point of fact, while the nature of things as constituted by God remains the same, the names which denote them are divided by so many differences of language, that it were no easy task even to calculate their number.
And if any one cites the confusion of tongues that took place at the building of the tower, as contradicting what I have said, not even there is God spoken of as creating men's languages, but as confounding the existing one, that all might not hear all. For when all lived together and were not as yet divided by various differences of race, the aggregate of men dwelt together with one language among them; but when by the Divine will it was decreed that all the earth should be replenished by mankind, then, their community of tongue being broken up, men were dispersed in various directions and adopted this and that form of speech and language, possessing a certain bond of union in similarity of tongue, not indeed disagreeing from others in their knowledge of things, but differing in the character of their names. For a stone or a stick does not seem one thing to one man and another to another, but the different peoples call them by different names. So that our position remains unshaken, that human language is the invention of the human mind or understanding. For from the beginning, as long as all men had the same language, we see from Holy Scripture that men received no teaching of God's words, nor, when men were separated into various differences of language, did a Divine enactment prescribe how each man should talk. But God, willing that men should speak different languages, gave human nature full liberty to formulate arbitrary sounds, so as to render their meaning more intelligible. Accordingly, Moses, who lived many generations after the building of the tower, uses one of the subsequent languages in his historical narrative of the creation, and attributes certain words to God, relating these things in his own tongue in which he had been brought up, and with which he was familiar, not changing the names for God by foreign peculiarities and turns of speech, in order by the strangeness and novelty of the expressions to prove them the words of God Himself.
But some who have carefully studied the Scriptures tell us that the Hebrew tongue is not even ancient like the others, but that along with other miracles this miracle was wrought in behalf of the Israelites, that after the Exodus from Egypt, the language was hastily improvised for the use of the nation. And there is a passage in the Prophet which confirms this. For he says, “when he came out of the land of Egypt he heard a strange language.” If, then, Moses was a Hebrew, and the language of the Hebrews was subsequent to the others, Moses, I say, who was born some thousands of years after the Creation of the world, and who relates the words of God in his own language— does he not clearly teach us that he does not attribute to God such a language of human fashion, but that he speaks as he does because it was impossible otherwise than in human language to express his meaning, though the words he uses have some Divine and profound significance?
For to suppose that God used the Hebrew tongue, when there was no one to hear and understand such a language, methinks no reasonable being will consent. We read in the Acts that the Divine power divided itself into many languages for this purpose, that no one of alien tongue might lose his share of the benefit. But if God spoke in human language before the Creation, whom was He to benefit by using it? For that His speech should have some adaptation to the capacity of the hearers, with a view to their profit, no one would conceive to be unworthy of God's love to man, for Paul the follower of Christ knew how to adapt his words suitably to the habits and disposition of his hearers, making himself milk for babes and strong meat for grown men. But where no object was to be gained by such use of language, to argue that God, as it were, declaimed such words by Himself, when there was no one in need of the information they would convey— such an idea, methinks, is at once both blasphemous and absurd. Neither, then, did God speak in the Hebrew language, nor did He express Himself according to any form in use among the Gentiles. But whatsoever of God's words are recorded by Moses or the Prophets, are indications of the Divine will, flashing forth, now in one way, now in another, on the pure intellect of those holy men, according to the measure of the grace of which they were partakers. Moses, then, spoke his mother-tongue, and that in which he was educated. But he attributed these words to God, as I have said, repeatedly, on account of the childishness of those who were being brought to the knowledge of God, in order to give a clear representation of the Divine will, and to render his hearers more obedient, as being awed by the authority of the speaker.
Source: Answer to Eunomius' Second Book (New Advent)