Over the last two Sundays I've preached on the topic of repentance and confession from Psalm 32. Here are a few related quotes I've read in my studies...
J.I. Packer, This We Believe: Sin makes an ugly and nauseating study. But if it leads us to acknowledge that God knows us better than we know ourselves and causes us to humble ourselves, then it is worthwhile. If it motivates us to lean harder on Christ, to live a life of grateful praise for salvation, and to dedicate ourselves to him as his disciples, then our ugly study will guide us along life-changing paths to a very joyful outcome.
John Colquhoun, Repentance: Consider, I entreat you, that without an affecting sense of the hatefulness of sin, there is no humiliation; that without humiliation, there is no true repentance; and that without such repentance, it will be impossible for you to escape the wrath to come. Study then in dependence on promised grace, and that without delay, to obtain a true and a deep sense of the exceeding sinfulness of your sin.
Ray Ortlund: We don't master our sins by heroic strength. We confess them to death. Every confession deprives a sin of oxygen.
John Calvin's comments on Psalm 32:4 ("For day and night your hand was heavy upon me..."): It is not without cause that the chastisements by which God seems to deal cruelly with us are repeated, and his hand made heavy against us, until our fierce pride, which we know to be untameable, unless subdued with the heaviest stripes, is humbled.
Ezekiel 33:10-11: "And you, son of man, say to the house of Israel, Thus have you said: 'Surely our transgressions and our sins are upon us, and we rot away because of them. How then can we live?' Say to them, As I live, declares the Lord GOD, I have no pleasure in the death of the wicked, but that the wicked turn from his way and live; turn back, turn back from your evil ways, for why will you die, O house of Israel?
King David, Psalm 32:5: I acknowledged my sin to you, and I did not cover my iniquity; I said, "I will confess my transgressions to the LORD," and you forgave the iniquity of my sin.