A religious experience (sometimes known as a spiritual experience, sacred experience, or mystical experience) is a subjective experience which is interpreted within a religious framework. The concept originated in the 19th century, as a defense against the growing rationalism of Western society.William James popularised the concept.
Many religious and mystical traditions see religious experiences (particularly that knowledge which comes with them) as revelations caused by divine agency rather than ordinary natural processes. They are considered real encounters with God or gods, or real contact with higher-order realities of which humans are not ordinarily aware.
Skeptics may hold that religious experience is an evolved feature of the human brain amenable to normal scientific study. The commonalities and differences between religious experiences across different cultures have enabled scholars to categorize them for academic study.
Psychologist and Philosopher William James described four characteristics of mystical experience in The Varieties of Religious Experience. According to James, such an experience is:
Norman Habel defines religious experiences as the structured way in which a believer enters into a relationship with, or gains an awareness of, the sacred within the context of a particular religious tradition (Habel, O'Donoghue and Maddox: 1993). Religious experiences are by their very nature preternatural; that is, out of the ordinary or beyond the natural order of things. They may be difficult to distinguish observationally from psychopathological states such as psychoses or other forms of altered awareness (Charlesworth: 1988). Not all preternatural experiences are considered to be religious experiences. Following Habel's definition, psychopathological states or drug-induced states of awareness are not considered to be religious experiences because they are mostly not performed within the context of a particular religious tradition.