The authors studied the religious beliefs, practices, and experiences of 52 psychiatric inpatients. The rate of belief in the major tenets of faith (God, the Devil, and an afterlife) was uniformly high and in accord with national and local public poll results. Patients with depressive and anxiety disorders tended to score lower than those with other diagnoses on a wide variety of indexes of religion. The authors conclude that religion is an important factor in most patients' lives and that individual inquiry and systematic research into this neglected area are both feasible and important.