John 1:14

(Hom. 2) Full of grace and truth. Of this the meaning is twofold. For it may be understood of the Humanity, and the Divinity of the Incarnate Word, so that the fulness of grace has reference to the Humanity, according to which Christ is the Head of the Church, and the first-born of every creature: for the greatest and original example of grace, by which man, with no preceding merits, is made God, is manifested primarily in Him. The fulness of the grace of Christ may also be understood of the Holy Spirit, whose sevenfold operation filled Christ's Humanity. (Is. 11:2) The fulness of truth applies to the Divinity ... But if you had rather understand the fulness of grace and truth of the New Testament, you may with propriety pronounce the fulness of the grace of the New Testament to be given by Christ, and the truth of the legal types to have been fulfilled in Him.

(x. de Trin. c. 21, 22) Some, however, who think God the Only-Begotten, God the Word, Who was in the beginning with God, not to be God substantially, but a Word sent forth, the Son being to God the Father, what a word is to one who utters it, these men, in order to disprove that the Word, being substantially God, and abiding in the form of God, was born the Man Christ, argue subtilly, that, whereas that Man (they say) derived His life rather from human origin than from the mystery of a spiritual conception, God the Word did not make Himself Man of the womb of the Virgin; but that the Word of God was in Jesus, as the spirit of prophecy in the Prophets. And they are accustomed to charge us with holding, that Christ was born a Man, notr of our body and soul; whereas we preach the Word made flesh, and after our likeness born Man, so that He Who is truly Son of God, was truly born Son of man; and that, as by His own act He took upon Him a body of the Virgin, so of Himself He took a soul also, which in no case is derived from man by mere parental origin. And seeing He, The Self-same, is the Son of man, how absurd were it, besides the Son of God, Who is the Word, to make Him another person besides, a sort of prophet, inspired by the Word of God; whereas our Lord Jesus Christ is both the Son of God, and the Son of man.

Having declared that we were made "sons of God," and having shown in what manner, namely, by the "Word" having been "made Flesh," he again mentions another advantage which we gain from this same circumstance. What is it? "We beheld His glory, the glory as of the Only-Begotten of the Father"; which we could not have beheld, had it not been shown to us, by means of a body like to our own. For if the men of old time could not even bear to look upon the glorified countenance of Moses, who partook of the same nature with us, if that just man needed a veil which might shade over the purity of his glory, and show to them have face of their prophet mild and gentle; how could we creatures of clay and earth have endured the unveiled Godhead, which is unapproachable even by the powers above? Wherefore He tabernacled among us, that we might be able with much fearlessness to approach Him, speak to, and converse with Him.

But what means "the glory as of the Only-Begotten of the Father"? Since many of the Prophets too were glorified, as this Moses himself, Elijah, and Elisha, the one encircled by the fiery chariot, the other taken up by it; and after them, Daniel and the Three Children, and the many others who showed forth wonders; and angels who have appeared among men, and partly disclosed to beholders the flashing light of their proper nature; and since not angels only, but even the Cherubim were seen by the Prophet in great glory, and the Seraphim also: the Evangelist leading us away from all these, and removing our thoughts from created things, and from the brightness of our fellow-servants, sets us at the very summit of good. For, "not of prophet," says he, "nor angel, nor archangel, nor of the higher power, nor of any other created nature," if other there be, but of the Master Himself, the King Himself, the true Only-Begotten Son Himself, of the Very Lord of all, did we "behold the glory."

For the expression "as," does not in this place belong to similarity or comparison, but to confirmation and unquestionable definition; as though he said, "We beheld glory, such as it was becoming, and likely that He should possess, who is the Only-Begotten and true Son of God, the King of all." The habit (of so speaking) is general, for I shall not refuse to strengthen my argument even from common custom, since it is not now my object to speak with any reference to beauty of words, or elegance of composition, but only for your advantage; and therefore there is nothing to prevent my establishing my argument by the instance of a common practice. What then is the habit of most persons? Often when any have seen a king richly decked, and glittering on all sides with precious stones, and are afterwards describing to others the beauty, the ornaments, the splendor, they enumerate as much as they can, the glowing tint of the purple robe, the size of the jewels, the whiteness of the mules, the gold about the yoke, the soft and shining couch. But when after enumerating these things, and other things besides these, they cannot, say what they will, give a full idea of the splendor, they immediately bring in: "But why say much about it; once for all, he was like a king;" not desiring by the expression "like," to show that he, of whom they say this, resembles a king, but that he is a real king. Just so now the Evangelist has put the word As, desiring to represent the transcendent nature and incomparable excellence of His glory.