Whether contrition is an assumed sorrow for sins, together with the purpose of confessing them and of making satisfaction for them?

Objections

Objection 1 : It would seem that contrition is not "an assumed sorrow for sins, together with the purpose of confessing them and of making satisfaction for them," as some define it. For, as Augustine states (De Civ. Dei xiv, 6), "sorrow is for those things that happen against our will." But this does not apply to sin. Therefore contrition is not sorrow for sins.
Objection 2 : Further, contrition is given us by God. But what is given is not assumed. Therefore contrition is not an assumed sorrow.
Objection 3 : Further, satisfaction and confession are necessary for the remission of the punishment which was not remitted by contrition. But sometimes the whole punishment is remitted in contrition. Therefore it is not always necessary for the contrite person to have the purpose of confessing and of making satisfaction.