On the contrary, It is written (Rom. 5:18): "As by the offense of one, unto all men to condemnation; so also by the justice of one, unto all men to justification of life." But Adam's demerits reached to the condemnation of others. Much more, therefore, does the merit of Christ reach others.
I answer that, As stated above (Q. 8, AA. 1, 5), grace was in Christ not merely as in an individual, but also as in the Head of the whole Church, to Whom all are united, as members to a head, who constitute one mystical person. And hence it is that Christ's merit extends to others inasmuch as they are His members; even as in a man the action of the head reaches in a manner to all his members, since it perceives not merely for itself alone, but for all the members.
Reply Obj. 1: The sin of an individual harms himself alone; but the sin of Adam, who was appointed by God to be the principle of the whole nature, is transmitted to others by carnal propagation. So, too, the merit of Christ, Who has been appointed by God to be the head of all men in regard to grace, extends to all His members.
Reply Obj. 2: Others receive of Christ's fulness not indeed the fount of grace, but some particular grace. And hence it need not be that men merit for others, as Christ did.
Reply Obj. 3: As the sin of Adam reaches others only by carnal generation, so, too, the merit of Christ reaches others only by spiritual regeneration, which takes place in baptism; wherein we are incorporated with Christ, according to Gal. 3:27, "As many of you as have been baptized in Christ, have put on Christ"; and it is by grace that it is granted to man to be incorporated with Christ. And thus man's salvation is from grace. _______________________
QUESTION 20
OF CHRIST'S SUBJECTION TO THE FATHER
(In Two Articles)
We must now consider such things as belong to Christ in relation to the Father. Some of these things are predicated of Him because of His relation to the Father, e.g. that He was subject to Him, that He prayed to Him, that He ministered, to Him by priesthood. And some are predicated, or may be predicated, of Him because of the Father's relation to Him, e.g. that the Father adopted Him and that He predestined Him.
Hence we must consider (1) Christ's subjection to the Father; (2) His prayer; (3) His priesthood; (4) Adoption—whether it is becoming to Him; (5) His predestination.
Under the first head there are two points of inquiry: