What do you pray to show sorrow for sin?
Roman Catholic AnswerThe usual prayer to express your sorrow for sin is the Act of Contrition, which has many forms, here is one I learned as a child: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.