I Will Be In Anguish Over My Sin

Good men, by setting their sorrow continually before them, have been ready to halt, who, by setting God always before them, have kept their standing. He remembered against himself his former transgressions, acknowledging that by them he had brought these troubles upon himself and forfeited the divine protection. Though before men he could justify himself, before God he will judge and condemn himself: "I will declare my iniquity, and not cover it; I will be sorry for my sin, and not make a light matter of it;" and this helped to make him silent under the rebukes of Providence and the reproaches of men. Note, If we be truly penitent for sin, that will make us patient under affliction, and particularly under unjust censures. Two things are required in repentance:
Confession of sin: "I will declare my iniquity; I will not only in general own myself a sinner, but I will make a particular acknowledgment of what I have done amiss." We must declare our sins before God freely and fully, and with their aggravating circumstances, that we may give glory to God and take shame to ourselves.
Contrition for sin: I will be sorry for it. Sin will have sorrow; every true penitent grieves for the dishonour he has done to God and the wrong he has done to himself. "I will be in care or fear about my sin" (so some), "in fear lest it ruin me and in care to get it pardoned." - Matthew Henry