The final quote is from Timothy Leary (1964), the psychologist turned guru who, during the 1960s, first exhorted youth to &s;tum on, tune in and drop out&s;. He and other members of the League of Spiritual Discovery (LSD) described how &s;a psychedelic journey is a journey to new realms of consciousness. The scope and content of the experience is limitless, but its characteristic features are...