87:6.16

Next came the practice of ritual vows, soon to be followed by religious pledges and sacred oaths. Most of these oaths were accompanied by self-torture and self-mutilation; later on, by fasting and prayer. Self-denial was subsequently looked upon as being a sure coercive; this was especially true in the matter of sex suppression. And so primitive man early developed a decided austerity in his religious practices, a belief in the efficacy of self-torture and self-denial as rituals capable of coercing the unwilling spirits to react favorably toward all such suffering and deprivation.