In a religious context, Islam, LDS, and religions like Jehovah's Witnesses have leaders who are not specially trained or qualified. An Imam in Islam might have specialized training, but in general he is "drawn from laity." Laity is a group of laypeople, or ordinary people. Likewise in some religions he is chosen from members because of his piety and observance. I only use the pronoun "he" because those religions, sadly, do not have women congregation leaders.