Turn on, tune in, drop out New York City on September 19, 1966. It urged people to embrace cultural changes through the use of psychedelics by detaching themselves from the existing conventions and hierarchies in society. It was also the motto of his League for Spiritual Discovery. The phrase was derided by more conservative critics. In his speech, Leary said: Leary later explained in his 1983 autobiography "Flashbacks": "Turn on, tune in, drop out" is also the title of a book () of essays by Timothy Leary, covering topics ranging from religion, education, and politics to Aldous Huxley, neurology, and psychedelic drugs. Leary later (during the
Turn on, tune in, drop out February 1967 salon known as the "Houseboat Summit") announced his agreement with a new ordering of the phrase as he said, "I would agree to change the slogan to 'Drop out. Turn on. Drop in.'" During his last decade, Leary proclaimed that the "PC is the LSD of the 1990s"—"turn on, boot up, jack in" reworked the existing phrase to suggest joining the cyberdelic counterculture. The phrase was referenced in several songs of the time. Psychedelic rock band Strawberry Alarm Clock parodies the quote in their 1967 song "Incense and Peppermints", singing "Turn on, tune in, turn your eyes around"