Whether we should have contrition for every actual sin?

❌ Objection 1 : It would seem that we have no need to have contrition for every actual sin we have committed. For contraries are healed by their contraries. Now some sins are committed through sorrow, e.g. sloth and envy. Therefore their remedy should not be sorrow, such as contrition is, but joy.

❌ Objection 2 : Further, contrition is an act of the will, which cannot refer to that which is not known. But there are sins of which we have no knowledge, such as those we have forgotten. Therefore we cannot have contrition for them.

❌ Objection 3 : Further, by voluntary contrition those sins are blotted out which we committed voluntarily. But ignorance takes away voluntariness, as the Philosopher declares (Ethic. iii, 1). Therefore contrition need not cover things which have occurred through ignorance.

❌ Objection 4 : Further, we need not be contrite for a sin which is not removed by contrition. Now some sins are not removed by contrition, e.g. venial sins, that remain after the grace of contrition. Therefore there is no need to have contrition for all one's past sins.