In the Lutheran tradition, mortification of the flesh is not done in order to earn merit, but instead to "keep the body in a condition such that it does not hinder one from doing what one has been commanded to do, according to one's calling (Latin: "juxta vocationem suam")." In "The Ninety-Five Theses", Martin Luther stated that "inner repentance is worthless unless it produces various outward mortification of the flesh." He practiced mortification of the flesh through fasting and self-flagellation, even sleeping in a stone cell without a blanket.