The penitent not only loathes his sin, but himself for his sin. He cries out with Job, chap. 40:4, “Behold I am vile, what shall I answer thee? I will lay mine hand upon my mouth.” Repentance sets a man at variance with himself. He sees his ugly face in the glass of God’s law, Christ’s sufferings, and the Lord’s goodness, and he loathes himself.
Source: http://www.puritanboard.com/f25/he-sees-his-ugly-face-85263/, Comment #1