" During its history, humankind has devoted astonishing energy and ingenuity to altering consciousness. In a survey of 488 societies in all parts of the world, Erika Bourgignon23 found that 437 of the societies had one or more culturally patterned forms of ASC. This means that fully 90 percent of the world’s cultures have one or more institutionalized ASC. In tribal societies and Eastern cultures these are regarded— almost without exception—as sacred or revered conditions. Mystical or sacred states of consciousness are called samadhi in yoga, moksha in Hinduism, satori in Zen, fana in Sufism, and ruach hakodesh in kabbalah. In the West they are known as unio mystica (Christian mysticism), a numinal state (Carl Jung), peak experience (Abraham Maslow), holotropic experience (Stanislav Grof), cosmic consciousness (Richard Bucke), and flow (Mihaly Csikszentmihalyi). "

― Rick Strassman , Inner Paths to Outer Space: Journeys to Alien Worlds through Psychedelics & Other Spiritual Technologies