Popular Islam is based mostly on oral tradition. Imams with virtually no formal education commonly memorize the entire Qur'an and recite appropriate verses on religious occasions. They also tell religious stories at village festivals and commemorations marking an individual's rites of passage. Predestination plays an important role in popular Islam. This concept includes the belief that everything that happens in life is the will of God and the belief that trying to avoid misfortune is useless and invites worse affliction. Revelations from God in the Qur'an form the basis of Monotheism merged with a belief in angels, jinn and afarit (spirits).