Act of Contrition

An act of contrition expresses sorrow for sin and the resolve to do better. Catholics say it in confession after telling their sins and also at night or at any time.

O my God, I am heartily sorry for having offended thee, and I detest all my sins, because I dread the loss of heaven and the pains of hell; but most of all because they offend thee, my God, who art all good and deserving of all my love. I firmly resolve, with the help of thy grace, to confess my sins, to do penance, and to amend my life. Amen.

From the Manual of Prayers (1889)

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