God's mercy is greater than our sins. There is an awareness of sin that does not lead to God but rather to self-preoccupation. Our temptation is to be so impressed by our sins and failings and so overwhelmed by our lack of generosity that we get stuck in a paralyzing guilt.

...

The question is: "Are we like Judas, who was so overcome by his sin that he could not believe in God's mercy any longer and hanged himself, or are we like Peter who returned to his Lord with repentance and cried bitterly for his sins?" The season of Lent, during which winter and spring struggle with each other for dominance, helps us in a special way to cry out for God's mercy.

from "Show Me the Way: Daily Lenten Readings" - Henri J.M. Nouwen