• The characteristic property of hallucinogens, to suspend the boundaries between the experiencing self and the outer world in an ecstatic, emotional experience, makes it posible with their help, and after suitable internal and external perparation, to evoke a mystical experience according to plan, so to speak. I see the true importance of LSD in the possibility of providing material aid to meditation aimed at the mystical experience of a deeper, comprehensive reality. Such a use accords entirely with the essence and working character of LSD as a sacred drug.

    "LSD: My Problem Child". Book by Albert Hofmann. Chaoter 11: "LSD Experience and Reality", 1980.