Thomas Aquinas - Summa Theologica, Part III (Tertia Pars)

On the contrary, It is written (Jer. 14:8): "Why wilt Thou be as a stranger in the land, and as a wayfaring man turning in to lodge?"

I answer that, A man is called a wayfarer from tending to beatitude, and a comprehensor from having already obtained beatitude, according to 1 Cor. 9:24: "So run that you may comprehend [Douay: 'obtain']"; and Phil. 3:12: "I follow after, if by any means I may comprehend [Douay: 'obtain']". Now man's perfect beatitude consists in both soul and body, as stated in the Second Part (I-II, Q. 4, A. 6). In the soul, as regards what is proper to it, inasmuch as the mind sees and enjoys God; in the body, inasmuch as the body "will rise spiritual in power and glory and incorruption," as is written 1 Cor. 15:42. Now before His passion Christ's mind saw God fully, and thus He had beatitude as far as it regards what is proper to the soul; but beatitude was wanting with regard to all else, since His soul was passible, and His body both passible and mortal, as is clear from the above (A. 4; Q. 14, AA. 1, 2). Hence He was at once comprehensor, inasmuch as He had the beatitude proper to the soul, and at the same time wayfarer, inasmuch as He was tending to beatitude, as regards what was wanting to His beatitude.

Reply Obj. 1: It is impossible to be moving towards the end and resting in the end, in the same respect; but there is nothing against this under a different respect—as when a man is at once acquainted with what he already knows, and yet is a learner with regard to what he does not know.

Reply Obj. 2: Beatitude principally and properly belongs to the soul with regard to the mind, yet secondarily and, so to say, instrumentally, bodily goods are required for beatitude; thus the Philosopher says (Ethic. i, 8), that exterior goods minister "organically" to beatitude.

Reply Obj. 3: There is no parity between the soul of a saint and of Christ, for two reasons: first, because the souls of saints are not passible, as Christ's soul was; secondly, because their bodies do nothing by which they tend to beatitude, as Christ by His bodily sufferings tended to beatitude as regards the glory of His body.

We must now consider the consequences of the union; and first as to

what belongs to Christ in Himself; secondly, as to what belongs to

Christ in relation with His Father; thirdly, as to what belongs to

Christ in relation to us.

Concerning the first, there occurs a double consideration. The first is about such things as belong to Christ in being and becoming; the second regards such things as belong to Christ by reason of unity.

Under the first head there are twelve points of inquiry:

(1) Whether this is true: "God is man"?

(2) Whether this is true: "Man is God"?

(3) Whether Christ may be called a lordly man?

(4) Whether what belongs to the Son of Man may be predicated of the Son of God, and conversely?

(5) Whether what belongs to the Son of Man may be predicated of the Divine Nature, and what belongs to the Son of God of the human nature?

(6) Whether this is true: "The Son of God was made man"?

(7) Whether this is true: "Man became God"?

(8) Whether this is true: "Christ is a creature"?

(9) Whether this is true: "This man," pointing out Christ, "began to be"? or "always was"?

(10) Whether this is true: "Christ as man is a creature"?

(11) Whether this is true: "Christ as man is God"?

(12) Whether this is true: "Christ as man is a hypostasis or person"? _______________________

FIRST ARTICLE [III, Q. 16, Art. 1]

Whether This Is True: "God Is Man"?

Objection 1: It would seem that this is false: "God is man." For every affirmative proposition of remote matter is false. Now this proposition, "God is man," is on remote matter, since the forms signified by the subject and predicate are most widely apart. Therefore, since the aforesaid proposition is affirmative, it would seem to be false.

Obj. 2: Further, the three Divine Persons are in greater mutual agreement than the human nature and the Divine. But in the mystery of the Incarnation one Person is not predicated of another; for we do not say that the Father is the Son, or conversely. Therefore it seems that the human nature ought not to be predicated of God by saying that God is man.

Obj. 3: Further, Athanasius says (Symb. Fid.) that, "as the soul and the flesh are one man, so are God and man one Christ." But this is false: "The soul is the body." Therefore this also is false: "God is man."

Obj. 4: Further, it was said in the First Part (Q. 39, A. 4) that what is predicated of God not relatively but absolutely, belongs to the whole Trinity and to each of the Persons. But this word "man" is not relative, but absolute. Hence, if it is predicated of God, it would follow that the whole Trinity and each of the Persons is man; and this is clearly false.

On the contrary, It is written (Phil. 2:6, 7): "Who being in the form of God . . . emptied Himself, taking the form of a servant, being made in the likeness of man, and in habit found as a man"; and thus He Who is in the form of God is man. Now He Who is in the form of God is God. Therefore God is man.

I answer that, This proposition "God is man," is admitted by all Christians, yet not in the same way by all. For some admit the proposition, but not in the proper acceptation of the terms. Thus the Manicheans say the Word of God is man, not indeed true, but fictitious man, inasmuch as they say that the Son of God assumed an imaginary body, and thus God is called man as a bronze figure is called man if it has the figure of a man. So, too, those who held that Christ's body and soul were not united, could not say that God is true man, but that He is figuratively called man by reason of the parts. Now both these opinions were disproved above (Q. 2, A. 5; Q. 5, A. 1).

Some, on the contrary, hold the reality on the part of man, but deny the reality on the part of God. For they say that Christ, Who is God and man, is God not naturally, but by participation, i.e. by grace; even as all other holy men are called gods—Christ being more excellently so than the rest, on account of His more abundant grace. And thus, when it is said that "God is man," God does not stand for the true and natural God. And this is the heresy of Photinus, which was disproved above (Q. 2, AA. 10, 11). But some admit this proposition, together with the reality of both terms, holding that Christ is true God and true man; yet they do not preserve the truth of the predication. For they say that man is predicated of God by reason of a certain conjunction either of dignity, or of authority, or of affection or indwelling. It was thus that Nestorius held God to be man—nothing further being meant than that God is joined to man by such a conjunction that man is dwelt in by God, and united to Him in affection, and in a share of the Divine authority and honor. And into the same error fall those who suppose two supposita or hypostases in Christ, since it is impossible to understand how, of two things distinct in suppositum or hypostasis, one can be properly predicated of the other: unless merely by a figurative expression, inasmuch as they are united in something, as if we were to say that Peter is John because they are somehow mutually joined together. And these opinions also were disproved above (Q. 2, AA. 3, 6).

Hence, supposing the truth of the Catholic belief, that the true Divine Nature is united with true human nature not only in person, but also in suppositum or hypostasis; we say that this proposition is true and proper, "God is man"—not only by the truth of its terms, i.e. because Christ is true God and true man, but by the truth of the predication. For a word signifying the common nature in the concrete may stand for all contained in the common nature, as this word "man" may stand for any individual man. And thus this word "God," from its very mode of signification, may stand for the Person of the Son of God, as was said in the First Part (Q. 39, A. 4). Now of every suppositum of any nature we may truly and properly predicate a word signifying that nature in the concrete, as "man" may properly and truly be predicated of Socrates and Plato. Hence, since the Person of the Son of God for Whom this word "God" stands, is a suppositum of human nature this word man may be truly and properly predicated of this word "God," as it stands for the Person of the Son of God.