By Steven Hayes
By Mary Ellen Copeland & Maxine Harris
By Joseph Campbell
By Robert A Johnson
By Stanislav Grof
By William W Hewitt
By Rick Strassman & Slawek Wojtowicz
By Jane Meredith
By Henry Corbin
By Giacomo Cuccinelli
By Gary Lachman
By Karla McLaren
By Dan Tomasulo
By Steven Stosny
By Charlie Morley
By Carl Gustav Jung
By Victor Frankl
By Janice Brewi & Anne Brennan
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