Exhortation to Abandon the Impious Mysteries of Idolatry for the Adoration of the Divine Word and God the Father
He awed men by the fire when He made flame to burst from the pillar of cloud— a token at once of grace and fear: if you obey, there is the light; if you disobey, there is the fire; but since humanity is nobler than the pillar or the bush, after them the prophets uttered their voice—the Lord Himself speaking in Isaiah, in Elias,— speaking Himself by the mouth of the prophets. But if you do not believe the prophets, but supposest both the men and the fire a myth, the Lord Himself shall speak to you, “who, being in the form of God, thought it not robbery to be equal with God, but humbled Himself,” — He, the merciful God, exerting Himself to save man. And now the Word Himself clearly speaks to you, shaming your unbelief; yea, I say, the Word of God became man, that you may learn from man how man may become God. Is it not then monstrous, my friends, that while God is ceaselessly exhorting us to virtue, we should spurn His kindness and reject salvation?
Does not John also invite to salvation, and is he not entirely a voice of exhortation? Let us then ask him, “Who of men are you, and whence?” He will not say Elias. He will deny that he is Christ, but will profess himself to be “a voice crying in the wilderness.” Who, then, is John? In a word, we may say, “The beseeching voice of the Word crying in the wilderness.” What do you cry, O voice? Tell us also. “Make straight the paths of the Lord.” John is the forerunner, and that voice the precursor of the Word; an inviting voice, preparing for salvation—a voice urging men on to the inheritance of the heavens, and through which the barren and the desolate is childless no more. This fecundity the angel's voice foretold; and this voice was also the precursor of the Lord preaching glad tidings to the barren woman, as John did to the wilderness. By reason of this voice of the Word, therefore, the barren woman bears children, and the desert becomes fruitful. The two voices which heralded the Lord's— that of the angel and that of John— intimate, as I think, the salvation in store for us to be, that on the appearance of this Word we should reap, as the fruit of this productiveness, eternal life. The Scripture makes this all clear, by referring both the voices to the same thing: “Let her hear who has not brought forth, and let her who has not had the pangs of childbirth utter her voice: for more are the children of the desolate, than of her who has an husband.”
The angel announced to us the glad tidings of a husband. John entreated us to recognise the husbandman, to seek the husband. For this husband of the barren woman, and this husbandman of the desert— who filled with divine power the barren woman and the desert— is one and the same. For because many were the children of the mother of noble rule, yet the Hebrew woman, once blessed with many children, was made childless because of unbelief: the barren woman receives the husband, and the desert the husbandman; then both become mothers through the word, the one of fruits, the other of believers. But to the unbelieving the barren and the desert are still reserved. For this reason John, the herald of the Word, besought men to make themselves ready against the coming of the Christ of God. And it was this which was signified by the dumbness of Zacharias, which waited for fruit in the person of the harbinger of Christ, that the Word, the light of truth, by becoming the Gospel, might break the mystic silence of the prophetic enigmas. But if you desire truly to see God, take to yourself means of purification worthy of Him, not leaves of laurel fillets interwoven with wool and purple; but wreathing your brows with righteousness, and encircling them with the leaves of temperance, set yourself earnestly to find Christ. “For I am,” He says, “the door,” which we who desire to understand God must discover, that He may throw heaven's gates wide open to us. For the gates of the Word being intellectual, are opened by the key of faith. No one knows God but the Son, and he to whom the Son shall reveal Him. And I know well that He who has opened the door hitherto shut, will afterwards reveal what is within; and will show what we could not have known before, had we not entered in by Christ, through whom alone God is beheld.
Source: Exhortation to the Heathen (New Advent)