TraditionalCatholic.net · Prayer 
Act of Contrition Actus Contritionis
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. Deus meus, ex toto corde poenitet me omnium meorum peccatorum, eaque detestor, quia peccando, non solum poenas a te iuste statutas promeritus sum, sed præsertim quia offendi te, summum bonum, ac dignum qui super omnia diligaris. Ideo firmiter propono, adiuvante gratia tua, peccata mea confiteri, pænitentiam agere, et vitam meam emendare. Amen.