Reply Obj. 2: The Son of Man has on earth the power of forgiving sins, not by virtue of the human nature, but by virtue of the Divine Nature, in which Divine Nature resides the power of forgiving sins authoritatively; whereas in the human nature it resides instrumentally and ministerially. Hence Chrysostom expounding this passage says [*Implicitly. Hom. xxx in Matth; cf. St. Thomas, Catena Aurea on Mk. 2:10]: "He said pointedly 'on earth to forgive sins,' in order to show that by an indivisible union He united human nature to the power of the Godhead, since although He was made Man, yet He remained the Word of God."
Reply Obj. 3: When we say "this man," the demonstrative pronoun "this" attracts "man" to the suppositum; and hence "Christ as this Man, is God, is a truer proposition than Christ as Man is God." _______________________
TWELFTH ARTICLE [III, Q. 16, Art. 12]
Whether This Is True: "Christ As Man Is a Hypostasis or Person"?
Objection 1: It would seem that Christ as Man is a hypostasis or person. For what belongs to every man belongs to Christ as Man, since He is like other men according to Phil. 2:7: "Being made in the likeness of men." But every man is a person. Therefore Christ as Man is a person.
Obj. 2: Further, Christ as Man is a substance of rational nature. But He is not a universal substance: therefore He is an individual substance. Now a person is nothing else than an individual substance of rational nature; as Boethius says (De Duab. Nat.). Therefore Christ as Man is a person.
Obj. 3: Further, Christ as Man is a being of human nature, and a suppositum and a hypostasis of the same nature. But every hypostasis and suppositum and being of human nature is a person. Therefore Christ as Man is a person.
On the contrary, Christ as Man is not an eternal person. Therefore if Christ as Man is a person it would follow that in Christ there are two persons—one temporal and the other eternal, which is erroneous, as was said above (Q. 2, A. 6; Q. 4, A. 2).
I answer that, As was said (AA. 10, 11), the term "Man" placed in the reduplication may refer either to the suppositum or to the nature. Hence when it is said: "Christ as Man is a person," if it is taken as referring to the suppositum, it is clear that Christ as Man is a person, since the suppositum of human nature is nothing else than the Person of the Son of God. But if it be taken as referring to the nature, it may be understood in two ways. First, we may so understand it as if it belonged to human nature to be in a person, and in this way it is true, for whatever subsists in human nature is a person. Secondly it may be taken that in Christ a proper personality, caused by the principles of the human nature, is due to the human nature; and in this way Christ as Man is not a person, since the human nature does not exist of itself apart from the Divine Nature, and yet the notion of person requires this.
Reply Obj. 1: It belongs to every man to be a person, inasmuch as everything subsisting in human nature is a person. Now this is proper to the Man Christ that the Person subsisting in His human nature is not caused by the principles of the human nature, but is eternal. Hence in one way He is a person, as Man; and in another way He is not, as stated above.