Back to the "Word became flesh" subject for a minute.
Trypho had this to say to Justin Martyr while they were talking about the virgin birth:
"Do not now suppose that I am endeavouring, by asking what I do ask, to overturn the statements you have made; but I wish to receive information respecting those very points about which I now inquire. Tell me, then, how, when the Scripture asserts by Isaiah, ‘There shall come forth a rod from the root of Jesse; and a flower shall grow up from the root of Jesse; and the Spirit of God shall rest upon Him, the spirit of wisdom and understanding, the spirit of counsel and might, the spirit of knowledge and piety: and the spirit of the fear of the Lord shall fill Him:' (now you admitted to me that this referred to Christ, and you maintain Him to be pre-existent God, and having become incarnate by God's will, to be born man by the Virgin) how He can be demonstrated to have been pre-existent, who is filled with the powers of the Holy Ghost, which the Scripture by Isaiah enumerates, as if He were in lack of them?"
To paraphrase:
"Why would Jesus need to have the Spirit come down on Him if
He was already God by birth?" (my words)
Good question.