3 But, according to these men, neither was the Word made flesh, nor Christ, nor the Saviour (Soter), who was produced from [the joint contributions of] all [the Æons]. For they will have it, that the Word and Christ never came into this world; that the Saviour, too, never became incarnate, nor suffered, but that He descended like a dove upon the dispensational Jesus; and that, as soon as He had declared the unknown Father, He did again ascend into the Pleroma. Some, however, make the assertion, that this dispensational Jesus did become incarnate, and suffered, whom they represent as having passed through Mary just as water through a tube; but others allege him to be the Son of the Demiurge, upon whom the dispensational Jesus descended; while others, again, say that Jesus was born from Joseph and Mary, and that the Christ from above descended upon him, being without flesh, and impassible.
But according to the opinion of no one of the heretics was the Word of God made flesh. For if anyone carefully examines the systems of them all, he will find that the Word of God is brought in by all of them as not having become incarnate (sine carne) and impassible, as is also the Christ from above. Others consider Him to have been manifested as a transfigured man; but they maintain Him to have been neither born nor to have become incarnate; while others [hold] that He did not assume a human form at all, but that, as a dove, He did descend upon that Jesus who was born from Mary. Therefore the Lord's disciple, pointing them all out as false witnesses, says, “And the Word was made flesh, and dwelt among us.”
Source: Adversus haereses (New Advent)