Divine Nature is born; as was said in the First Part (Q.
39, A. 5). So, too, in the mystery of the Incarnation we say that the
Son of God suffered, yet we do not say that the Divine Nature
suffered.

Reply Obj. 2: Incarnation implies union with flesh, rather than any
property of flesh. Now in Christ each nature is united to the other
in person; and by reason of this union the Divine Nature is said to
be incarnate and the human nature deified, as stated above (Q. 2, A.
1, ad 3).

Reply Obj. 3: What belongs to the Divine Nature is predicated of the
human nature--not, indeed, as it belongs essentially to the Divine
Nature, but as it is participated by the human nature. Hence,
whatever cannot be participated by the human nature (as to be
uncreated and omnipotent), is nowise predicated of the human nature.
But the Divine Nature received nothing by participation from the
human nature; and hence what belongs to the human nature can nowise
be predicated of the Divine Nature.
_______________________

SIXTH ARTICLE [III, Q. 16, Art. 6]

Whether This Is True: "God Was Made Man"?

Objection 1: It would seem that this is false: "God was made man."
For since man signifies a substance, to be made man is to be made
simply. But this is false: "God was made simply." Therefore this is
false: "God was made man."

Obj. 2: Further, to be made man is to be changed. But God cannot be
the subject of change, according to Malachi 3:6: "I am the Lord, and
I change not." Hence this is false: "God was made man."

Obj. 3: Further, man as predicated of Christ stands for the Person of
the Son of God. But this is false: "God was made the Person of the
Son of God." Therefore this is false: "God was made man."

_On the contrary,_ It is written (John 1:14): "The Word was made
flesh": and as Athanasius says (Ep. ad Epictetum), "when he said,
'The Word was made flesh,' it is as if it were said that God was
made man."

_I answer that,_ A thing is said to be made that which begins to be
predicated of it for the first time. Now to be man is truly
predicated of God, as stated above (A. 1), yet in such sort that it
pertains to God to be man, not from eternity, but from the time of
His assuming human nature. Hence, this is true, "God was made man";
though it is understood differently by some: even as this, "God is
man," as we said above (A. 1).

Reply Obj. 1: To be made man is to be made simply, in all those in
whom human nature begins to be in a ne