GESHE MICHAEL ROACH has been a teacher of Buddhism since 1981 and also worked as a director of a large diamond company. He is the author of The Diamond Cutter, The Garden and The Tibetan Book of Yoga and coauthor of The Essential Yoga Sutra, How Yoga Works and The Eastern Path to Heaven. He founded and directs the Asian Classics Institute, the Asian Classics Input Project and Diamond Mountain University in Arizona. LAMA CHRISTIE McNALLY is the cofounder of the Yoga Studies Institute and Diamond Mountain University, Arizona, author of The Tibetan Book of Meditation and the coauthor of The Essential Yoga Sutra, How Yoga Works and The Eastern Path to Heaven. MICHAEL GORDON is the founder and CEO of Bumble & Bumble, a $230-million-a-year hair-products corporation.