IV. And yet penitence and reconciliation must not be refused to men in extremis.
But to those who in time of need and in urgent danger implore the aid first of penitence, then of reconciliation, must neither means of amendment nor reconciliation be forbidden: because we cannot place limits to God's mercy nor fix times for Him with whom true conversion suffers no delay of forgiveness, as says God's Spirit by the prophet, “when you have turned and lamented, then shall you be saved;” and elsewhere, “Declare your iniquities beforehand, that you may'st be justified;” and again, “For with the Lord there is mercy, and with Him is plenteous redemption.” And so in dispensing God's gifts we must not be hard, nor neglect the tears and groans of self-accusers, seeing that we believe the very feeling of penitence springs from the inspiration of God, as says the Apostle, “lest perchance God will give them repentance that they may recover themselves from the snares of the devil, by whom they are held captive at his will.”
Source: Letters (New Advent)