Whether a man is bound to have contrition for his future sins?

Objections

Objection 1 : It would seem that a man is bound to have contrition for his future sins also. For contrition is an act of the free-will: and the free-will extends to the future rather than to the past, since choice, which is an act of the free-will, is about future contingents, as stated in Ethic. iii. Therefore contrition is about future sins rather than about past sins.
Objection 2 : Further, sin is aggravated by the result that ensues from it: wherefore Jerome says [*St. Basil asserts this implicitly in De Vera Virgin.] that the punishment of Arius is not yet ended, for it is yet possible for some to be ruined through his heresy, by reason of whose ruin his punishment would be increased: and the same applies to a man who is judged guilty of murder, if he has committed a murderous assault, even before his victim dies. Now the sinner ought to be contrite during that intervening time. Therefore the degree of his contrition ought to be proportionate not only to his past act, but also to its eventual result: and consequently contrition regards the future.