True repentance begins with a knowledge of sin. The eyes of the repentant person are opened. They see with dismay and confusion the length and breadth of God's holy law, and the extent, the enormous extent, of their own transgressions. They discover, to their surprise, that in thinking themselves a "good sort of person," and a person with a "good heart," they have been under a huge delusion. They find out that, in reality, they are wicked, and guilty, and corrupt, and evil in God's sight. Their pride breaks down. Their high thoughts melt away. They see that they are a great sinner. This is the first step in true repentance.

~ J.C. Ryle

Old Paths, "Repentance", [Carlisle, PA: Banner of Truth, 1999], 406.