" * The distinction between psycholytic and psychedelic doses of LSD is used in many scientific publications but seems to be ignored by popularizers who either preach the “LSD utopia” or warn of the “decline of the west.” A psycholytic dose, generally 75 or 100 – or at most 200 – micrograms, causes a rush of thoughts, a lot of free association, some visualization (hallucination) and abreaction (memories so vivid that one seems to relive the experience). A psychedelic dose, around 500 micrograms, produces total but temporary breakdown of usual ways of perceiving self and world and (usually) some form of “peak experience” or mystic transcendence of ego. “Bad trips” usually occur only on psychedelic doses. ~•~ "

― Robert Anton Wilson , Sex, Drugs & Magick