Psalms 89:32

These things we suffer by our own fault and our own deserving, even as the divine judgment has forewarned us, saying, "If they forsake my law and walk not in my judgments, if they profane my statutes and keep not my commandments, then will I visit their transgressions with the rod, and their iniquities with stripes." It is for this reason that we feel the rods and the stripes, because we neither please God with good deeds nor atone for our sins. Let us of our inmost heart and of our entire mind ask for God's mercy, because He Himself also adds, saying, "Nevertheless my loving-kindness will I not scatter away from them." Let us ask, and we shall receive; and if there be delay and tardiness in our receiving, since we have grievously offended, let us knock, because "to him that knocketh also it shall be opened," if only our prayers, our groanings, and our tears, knock at the door; and with these we must be urgent and persevering, even although prayer be offered with one mind.

Not without reason was [the soul] given horns and hoofs, to bruise all the sheaves of the threshing floor, like the calf of Libanius, for, unless the sheaves are bruised and the straw winnowed, the corn within cannot appear and be separated. Let the soul that would advance in virtue first bruise and thresh out its superfluous passions that at the harvest it may have its fruits to show. How many weeds choke the good seed! These first must be rooted out, so that they will not destroy the fruitful crop of the soul.The careful guardian of the soul then sees how he may restrain [the soul] in its pleasures and cut off its desires, to prevent it being overwhelmed with delight in them. The correction of the father who does not spare the rod is useful, that he may render his son's soul obedient to the precepts of salvation. He punishes with a rod, as we read: "I shall punish their offenses with a rod." Therefore, one who with a rod strikes an Israelite's soul on the cheek instructs that one by the Lord's punishment in the discipline of patience. No one who is chastened and corrected need lose hope, for one who loves his son chastises him. No one should despair of a remedy.

The Lord certainly would not exhort to repentance unless he promised pardon to the penitent. In the Gospel the Lord says, "Just so, I tell you, there will be joy in heaven over one sinner who repents, more than over ninety-nine just who have no need of repentance." Since it is written, "God is not the author of death, nor does he rejoice in the destruction of the living," certainly he, who wishes no one to perish, desires sinners to do penance and to return to life again through penance. And there, through Joel the prophet, he cries out and says, "And now says the Lord, your God, return to me with your whole heart, at the same time with fasting, and weeping and mourning; and rend your hearts and not your garments, and return to the Lord, your God. For gracious and merciful is he, slow to anger, rich in kindness, and he softens the sentence inflicted against malice." In the Psalms we read also of the censure and of the clemency of God, at the same time, threatening and sparing, punishing that he may correct and saving when he has corrected. "I will visit," he says, "their crime with a rod and their guilt with stripes. Yet my kindness I will not take from them."