14 But now, what wounds can those who are overcome show? What gashes of gaping entrails, what tortures of the limbs, in cases where it was not faith that fell in the encounter, but faithlessness that anticipated the struggle? Nor does the necessity of the crime excuse the person compelled, where the crime is committed of free will. Nor do I say this in such a way as that I would burden the cases of the brethren, but that I may rather instigate the brethren to a prayer of atonement.
For, as it is written, “They who call you happy cause you to err, and destroy the paths of your feet,” he who soothes the sinner with flattering blandishments furnishes the stimulus to sin; nor does he repress, but nourishes wrong-doing. But he who, with braver counsels, rebukes at the same time that he instructs a brother, urges him onward to salvation. “As many as I love,” says the Lord, “I rebuke and chasten.” And thus also it behooves the Lord's priest not to mislead by deceiving concessions, but to provide with salutary remedies.
He is an unskilful physician who handles the swelling edges of wounds with a tender hand, and, by retaining the poison shut up in the deep recesses of the body, increases it. The wound, must be opened, and cut, and healed by the stronger remedy of cutting out the corrupting parts. The sick man may cry out, may vociferate, and may complain, in impatience of the pain; but he will afterwards give thanks when he has felt that he is cured.
Source: The Treatises of Cyprian (New Advent)