Harvard psychology professor Timothy Leary delivers a lecture at the International Congress of Applied Psychology in Copenhagen, Denmark. The lecture, "How To Change Behavior," talks about changing behavior through changing (expanding) consciousness and the role of psilocybin in achieving such a state.
* Text of lecture: @
* Blog post from August 9, 1960 (when Leary first ingested psilocybin mushrooms): @
* The Psychedelic Library: @