This work is a comprehensive study of the philosophical issues raised by mysticism. Mystics claim to experience reality in a way not available in normal life, a claim which makes this phenomenon interesting from a philosophical perspective. Richard H. Jones's inquiry focuses on the skeleton of beliefs and values of mysticism: knowledge claims made about the nature of reality and of human beings; value claims about what is significant and what is ethical; and mystical goals and ways of life. Jones engages language, epistemology, metaphysics, science, and the philosophy of mind. Methodological issues in the study of mysticism are also addressed. Examples of mystical experience are drawn chiefly from Buddhism and Advaita Vedanta, but also from Christianity, Judaism, Islam, and Daoism.