Reply Obj. 1: This likeness indicates the truth of the human nature in Christ—just as all that truly exist in human nature are said to be like in species—and not a mere imaginary likeness. In proof of this the Apostle subjoins (Phil. 2:8) that He became "obedient unto death, even to the death of the cross"; which would have been impossible, had it been only an imaginary likeness.
Reply Obj. 2: By assuming a true body the dignity of the Son of God is nowise lessened. Hence Augustine [*Fulgentius] says (De Fide ad Petrum ii): "He emptied Himself, taking the form of a servant, that He might become a servant; yet did He not lose the fulness of the form of God." For the Son of God assumed a true body, not so as to become the form of a body, which is repugnant to the Divine simplicity and purity—for this would be to assume a body to the unity of the nature, which is impossible, as is plain from what has been stated above (Q. 2, A. 1): but, the natures remaining distinct, He assumed a body to the unity of Person.
Reply Obj. 3: The figure ought to correspond to the reality as regards the likeness and not as regards the truth of the thing. For if they were alike in all points, it would no longer be a likeness but the reality itself, as Damascene says (De Fide Orth. iii, 26). Hence it was more fitting that the apparitions of the old Testament should be in appearance only, being figures; and that the apparition of the Son of God in the world should be in a real body, being the thing prefigured by these figures. Hence the Apostle says (Col. 2:17): "Which are a shadow of things to come, but the body is Christ's." _______________________
SECOND ARTICLE [III, Q. 5, Art. 2]
Whether the Son of God Ought to Have Assumed a Carnal or Earthly Body?
Objection 1: It would seem that Christ had not a carnal or earthly, but a heavenly body. For the Apostle says (1 Cor. 15:41): "The first man was of the earth, earthy; the second man from heaven, heavenly." But the first man, i.e. Adam, was of the earth as regards his body, as is plain from Gen. 1. Therefore the second man, i.e. Christ, was of heaven as regards the body.
Obj. 2: Further, it is said (1 Cor. 15:50): "Flesh and blood shall
not [Vulg.: 'cannot'] possess the kingdom of God." But the kingdom of
God is in Christ chiefly. Therefore there is no flesh or blood in
Him, but rather a heavenly body.
Obj. 3: Further, whatever is best is to be attributed to God. But of all bodies a heavenly body is the best. Therefore it behooved Christ to assume such a body.
On the contrary, our Lord says (Luke 24:39): "A spirit hath not flesh and bones, as you see Me to have." Now flesh and bones are not of the matter of heavenly bodies, but are composed of the inferior elements. Therefore the body of Christ was not a heavenly, but a carnal and earthly body.
I answer that, By the reasons which proved that the body of Christ was not an imaginary one, it may also be shown that it was not a heavenly body. First, because even as the truth of the human nature of Christ would not have been maintained had His body been an imaginary one, such as Manes supposed, so likewise it would not have been maintained if we supposed, as did Valentine, that it was a heavenly body. For since the form of man is a natural thing, it requires determinate matter, to wit, flesh and bones, which must be placed in the definition of man, as is plain from the Philosopher (Metaph. vii, 39). Secondly, because this would lessen the truth of such things as Christ did in the body. For since a heavenly body is impassible and incorruptible, as is proved De Coel. i, 20, if the Son of God had assumed a heavenly body, He would not have truly hungered or thirsted, nor would he have undergone His passion and death. Thirdly, this would have detracted from God's truthfulness. For since the Son of God showed Himself to men, as if He had a carnal and earthly body, the manifestation would have been false, had He had a heavenly body. Hence (De Eccles. Dogm. ii) it is said: "The Son of God was born, taking flesh of the Virgin's body, and not bringing it with Him from heaven."