Tertullian

“ But before doing this, I will make short work with an answer which meets us from the opposite side, in reference to that species of repentance which we are just defining as being without pardon. “Why, if,” say they, “there is a repentance which lacks pardon, it immediately follows that such repentance must withal be wholly unpractised by you. For nothing is to be done in vain. Now repentance will be practised in vain, if it is without pardon. But all repentance is to be practised. ”