Why would anyone seek out the very experience the rest of us most wish to avoid? Why would religious worshipers flog or crucify themselves, sleep on spikes, hang suspended by their flesh, or walk for miles through scorching deserts with bare and bloodied feet?. In this insightful new book, Ariel Glucklich argues that the experience of ritual pain, far from being a form of a madness or superstition, contains a hidden rationality and can bring about a profound transformation of the consciousness and identity of the spiritual seeker. Steering a course between purely cultural and purely biological