15 But some one will say to me, You adduce a thing strange to me, when you call the Son the Word. For John indeed speaks of the Word, but it is by a figure of speech. Nay, it is by no figure of speech. For while thus presenting this Word that was from the beginning, and has now been sent forth, he said below in the Apocalypse, “And I saw heaven opened, and behold a white horse; and He that sat upon him (was) Faithful and True; and in righteousness He does judge and make war.
And His eyes (were) as flame of fire, and on His head were many crowns; and He had a name written that no man knew but He Himself. And He (was) clothed in a vesture dipped in blood: and His name is called the Word of God.” See then, brethren, how the vesture sprinkled with blood denoted in symbol the flesh, through which the impassible Word of God came under suffering, as also the prophets testify to me. For thus speaks the blessed Micah: “The house of Jacob provoked the Spirit of the Lord to anger.
These are their pursuits. Are not His words good with them, and do they walk rightly? And they have risen up in enmity against His countenance of peace, and they have stripped off His glory.” That means His suffering in the flesh. And in like manner also the blessed Paul says, “For what the law could not do, in that it was weak, God, sending His own Son in the likeness of sinful flesh, condemned sin in the flesh, that the righteousness of the law might be shown in us, who walk not after the flesh, but after the Spirit.” What Son of His own, then, did God send through the flesh but the Word, whom He addressed as Son because He was to become such (or be begotten) in the future?
And He takes the common name for tender affection among men in being called the Son. For neither was the Word, prior to incarnation and when by Himself, yet perfect Son, although He was perfect Word, only-begotten. Nor could the flesh subsist by itself apart from the Word, because it has its subsistence in the Word. Thus, then, one perfect Son of God was manifested.
Source: Against the Heresy of Noetus (New Advent)