Obj. 3: Further, it is written (Ps. 80:10): "There shall be no new God in thee." But man is something new; for Christ was not always man. Therefore this is false: "Man is God."
On the contrary, It is written (Rom. 9:5): "Of whom is Christ according to the flesh, Who is over all things, God blessed for ever." Now Christ, according to the flesh, is man. Therefore this is true: "Man is God."
I answer that, Granted the reality of both natures, i.e. Divine and human, and of the union in person and hypostasis, this is true and proper: "Man is God," even as this: "God is man." For this word "man" may stand for any hypostasis of human nature; and thus it may stand for the Person of the Son of God, Whom we say is a hypostasis of human nature. Now it is manifest that the word "God" is truly and properly predicated of the Person of the Son of God, as was said in the First Part (Q. 39, A. 4). Hence it remains that this is true and proper: "Man is God."
Reply Obj. 1: Idolaters attributed the name of the Deity to stones and wood, considered in their own nature, because they thought there was something divine in them. But we do not attribute the name of the Deity to the man in His human nature, but in the eternal suppositum, which by union is a suppositum of human nature, as stated above.
Reply Obj. 2: This word "Father" is predicated of this word "God," inasmuch as this word "God" stands for the Person of the Father. And in this way it is not predicated of the Person of the Son, because the Person of the Son is not the Person of the Father. And, consequently, it is not necessary that this word "Father" be predicated of this word "Man," of which the Word "God" is predicated, inasmuch as "Man" stands for the Person of the Son.
Reply Obj. 3: Although the human nature in Christ is something new, yet the suppositum of the human nature is not new, but eternal. And because this word "God" is predicated of man not on account of the human nature, but by reason of the suppositum, it does not follow that we assert a new God. But this would follow, if we held that "Man" stands for a created suppositum: even as must be said by those who assert that there are two supposita in Christ [*Cf. Q. 2, AA. 3, 6]. _______________________
THIRD ARTICLE [III, Q. 16, Art. 3]
Whether Christ Can Be Called a Lordly Man?*
[*The question is hardly apposite in English. St. Thomas explains why we can say in Latin, e.g. oratio dominica (the Lord's Prayer) or passio dominica (Our Lord's Passion), but not speak of our Lord as homo dominicus (a lordly man)].
Objection 1: It would seem that Christ can be called a lordly man. For Augustine says (Qq. lxxxiii, qu. 36) that "we are to be counseled to hope for the goods that were in the Lordly Man"; and he is speaking of Christ. Therefore it seems that Christ was a lordly man.