It behoves those who have received from God the power to loose and bind, to consider the quality of the sin and the readiness of the sinner for conversion, and to apply medicine suitable for the disease, lest if he is injudicious in each of these respects he should fail in regard to the healing of the sick man. For the disease of sin is not simple, but various and multiform, and it germinates many mischievous offshoots, from which much evil is diffused, and it proceeds further until it is checked by the power of the physician. Wherefore he who professes the science of spiritual medicine ought first of all to consider the disposition of him who has sinned, and to see whether he tends to health or (on the contrary) provokes to himself disease by his own behaviour, and to look how he can care for his manner of life during the interval. And if he does not resist the physician, and if the ulcer of the soul is increased by the application of the imposed medicaments, then let him mete out mercy to him according as he is worthy of it. For the whole account is between God and him to whom the pastoral rule has been delivered, to lead back the wandering sheep and to cure that which is wounded by the serpent; and that he may neither cast them down into the precipices of despair, nor loosen the bridle towards dissolution or contempt of life; but in some way or other, either by means of sternness and astringency, or by greater softness and mild medicines, to resist this sickness and exert himself for the healing of the ulcer, now examining the fruits of his repentance and wisely managing the man who is called to higher illumination. For we ought to know two things, to wit, the things which belong to strictness and those which belong to custom, and to follow the traditional form in the case of those who are not fitted for the highest things, as holy Basil teaches us.

Ancient Epitome of Canon CII.

The character of a sin must be considered from all points and conversion expected. And so let mercy be meted out.