Whether the Son of God assumed a person?
Objection 1: It would seem that the Son of God assumed a person. For Damascene says (De Fide Orth. iii, 11) that the Son of God "assumed human nature 'in atomo,'" i.e. in an individual. But an individual in rational nature is a person, as is plain from Boethius (De Duab. Nat.). Therefore the Son of God assumed a person.
Objection 2: Further, Damascene says (De Fide Orth. iii, 6) that the Son of God "assumed what He had sown in our nature." But He sowed our personality there. Therefore the Son of God assumed a person.
Objection 3: Further, nothing is absorbed unless it exist. But Innocent III [*Paschas. Diac., De Spiritu Sanct. ii] says in a Decretal that "the Person of God absorbed the person of man." Therefore it would seem that the person of man existed previous to its being assumed.
On the contrary, Augustine [*Fulgentius] says (De Fide ad Petrum ii) that "God assumed the nature, not the person, of man."
I answer that, A thing is said to be assumed inasmuch as it is taken into another. Hence, what is assumed must be presupposed to the assumption, as what is moved locally is presupposed to the motion. Now a person in human nature is not presupposed to assumption; rather, it is the term of the assumption, as was said (Q 3, AA 1,2). For if it were presupposed, it must either have been corrupted---in which case it was useless; or it remains after the union---and thus there would be two persons, one assuming and the other assumed, which is false, as was shown above (Q 2, A 6). Hence it follows that the Son of God nowise assumed a human person.
Reply to Objection 1: The Son of God assumed human nature "in atomo," i.e. in an individual, which is no other than the uncreated suppositum, the Person of the Son of God. Hence it does not follow that a person was assumed.
Reply to Objection 2: Its proper personality is not wanting to the nature assumed through the loss of anything pertaining to the perfection of the human nature but through the addition of something which is above human nature, viz. the union with a Divine Person.
Reply to Objection 3: Absorption does not here imply the destruction of anything pre-existing, but the hindering what might otherwise have been. For if the human nature had not been assumed by a Divine Person, the human nature would have had its own personality; and in this way is it said, although improperly, that the Person "absorbed the person," inasmuch as the Divine Person by His union hindered the human nature from having its personality.
III · Q. 4, Art. 3: Whether the Divine Person assumed a man?
Whether the Divine Person assumed a man?
Objection 1: It would seem that the Divine Person assumed a man. For it is written (Ps. 64:5): "Blessed is he whom Thou hast chosen and taken to Thee," which a gloss expounds of Christ; and Augustine says (De Agone Christ. xi): "The Son of God assumed a man, and in him bore things human."
Objection 2: Further, the word "man" signifies a human nature. But the Son of God assumed a human nature. Therefore He assumed a man.
Objection 3: Further, the Son of God is a man. But He is not one of the men He did not assume, for with equal reason He would be Peter or any other man. Therefore He is the man whom He assumed.
On the contrary, Is the authority of Felix, Pope and Martyr, which is quoted by the Council of Ephesus: "We believe in our Lord Jesus Christ, born of the Virgin Mary, because He is the Eternal Son and Word of God, and not a man assumed by God, in such sort that there is another besides Him. For the Son of God did not assume a man, so that there be another besides Him."
I answer that, As has been said above (A 2), what is assumed is not the term of the assumption, but is presupposed to the assumption. Now it was said (Q 3, AA 1,2) that the individual to Whom the human nature is assumed is none other than the Divine Person, Who is the term of the assumption. Now this word "man" signifies human nature, as it is in a suppositum, because, as Damascene says (De Fide Orth. iii, 4,11), this word God signifies Him Who has human nature. And hence it cannot properly be said that the Son assumed a man, granted (as it must be, in fact) that in Christ there is but one suppositum and one hypostasis. But according to such as hold that there are two hypostases or two supposita in Christ, it may fittingly and properly be said that the Son of God assumed a man. Hence the first opinion quoted in Sent. iii, D. 6, grants that a man was assumed. But this opinion is erroneous, as was said above (Q 2, A 6).
Reply to Objection 1: These phrases are not to be taken too literally, but are to be loyally explained, wherever they are used by holy doctors; so as to say that a man was assumed, inasmuch as his nature was assumed; and because the assumption terminated in this---that the Son of God is man.
Reply to Objection 2: The word "man" signifies human nature in the concrete, inasmuch as it is in a suppositum; and hence, since we cannot say a suppositum was assumed, so we cannot say a man was assumed.
Reply to Objection 3: The Son of God is not the man whom He assumed, but the man whose nature He assumed.