Stan Grof describes a specific subgroup of non-ordinary states of consciousness that he refers to as holotropic.
03:02 min
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This segment filmed during the 1970s features Bob Monroe's welcome talk to a Gateway Voyage program group.
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"In an out-of-body experience (OBE), people feel as though they have left their physical body and can see the world from outside it.
Does some aspect of our personality survive bodily death? Long a philosophical and theological question, in the 20th century this became the subject of scientific research.
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Charles T. Tart, PhD, is emeritus professor of psychology at the University of California, Davis, as well as the Institute of Transpersonal Psychology. Here he discusses a number of altered states including marijuana intoxication, dreaming, hypnosis, and out-of-body experiences.