LSD truly was an acid, dissolving almost everything with which it came into contact, beginning with the hierarchies of the mind (the superego, ego, and unconscious) and going on from there to society’s various structures of authority and then to lines of every imaginable kind: between patient and therapist, research and recreation, sickness and health, self and other, subject and object, the spiritual and the material. If all such lines are manifestations of the Apollonian strain in Western civilization, the impulse that erects distinctions, dualities, and hierarchies and defends them, then psychedelics represented the ungovernable Dionysian force that blithely washes all those lines away.