On the contrary, In reckoning what is required for a thing we ought not to pass over the end, which is the chief part of everything. Now the remission of sins is the end of the justification of the ungodly; for it is written (Isa. 27:9): "This is all the fruit, that the sin thereof should be taken away." Hence the remission of sins ought to be reckoned amongst the things required for justification.
I answer that, There are four things which are accounted to be necessary for the justification of the ungodly, viz. the infusion of grace, the movement of the free-will towards God by faith, the movement of the free-will towards sin, and the remission of sins. The reason for this is that, as stated above (A. 1), the justification of the ungodly is a movement whereby the soul is moved by God from a state of sin to a state of justice. Now in the movement whereby one thing is moved by another, three things are required: first, the motion of the mover; secondly, the movement of the moved; thirdly, the consummation of the movement, or the attainment of the end. On the part of the Divine motion, there is the infusion of grace; on the part of the free-will which is moved, there are two movements—of departure from the term whence, and of approach to the term whereto; but the consummation of the movement or the attainment of the end of the movement is implied in the remission of sins; for in this is the justification of the ungodly completed.
Reply Obj. 1: The justification of the ungodly is called the remission of sins, even as every movement has its species from its term. Nevertheless, many other things are required in order to reach the term, as stated above (A. 5).
Reply Obj. 2: The infusion of grace and the remission of sin may be considered in two ways: first, with respect to the substance of the act, and thus they are the same; for by the same act God bestows grace and remits sin. Secondly, they may be considered on the part of the objects; and thus they differ by the difference between guilt, which is taken away, and grace, which is infused; just as in natural things generation and corruption differ, although the generation of one thing is the corruption of another.
Reply Obj. 3: This enumeration is not the division of a genus into its species, in which the things enumerated must be simultaneous; but it is division of the things required for the completion of anything; and in this enumeration we may have what precedes and what follows, since some of the principles and parts of a composite thing may precede and some follow. ________________________
SEVENTH ARTICLE [I-II, Q. 113, Art. 7]
Whether the Justification of the Ungodly Takes Place in an Instant or
Successively?
Objection 1: It would seem that the justification of the ungodly does not take place in an instant, but successively, since, as already stated (A. 3), for the justification of the ungodly, there is required a movement of free-will. Now the act of the free-will is choice, which requires the deliberation of counsel, as stated above (Q. 13, A. 1). Hence, since deliberation implies a certain reasoning process, and this implies succession, the justification of the ungodly would seem to be successive.
Obj. 2: Further, the free-will's movement is not without actual consideration. But it is impossible to understand many things actually and at once, as stated above (I, Q. 85, A. 4). Hence, since for the justification of the ungodly there is required a movement of the free-will towards several things, viz. towards God and towards sin, it would seem impossible for the justification of the ungodly to be in an instant.
Obj. 3: Further, a form that may be greater or less, e.g. blackness or whiteness, is received successively by its subject. Now grace may be greater or less, as stated above (Q. 112, A. 4). Hence it is not received suddenly by its subject. Therefore, seeing that the infusion of grace is required for the justification of the ungodly, it would seem that the justification of the ungodly cannot be in an instant.