From a 1966 Pixie Records release by Dr. Timothy Leary, the man who coined the phrase, "Turn on, tune in, drop out", who was called "the most dangerous man in America" by Richard Nixon, and who remains controversial to this day including amongst the counterculture (he died in 1996). Here he outlines chapter and verse of his LSD gospel. (30 minutes)
Editor's note: We normally avoid linking to Wikipedia on the subjects we broadcast but the Leary page is pretty impressive. A good start.