The Doors of Perception is a philosophical essay, released as a book, by Aldous Huxley. First published in 1954, it details his experiences when taking mescaline. The book takes the form of Huxley's recollection of a mescaline trip that took place over the course of an afternoon in May 1953. The book takes its title from a phrase in William Blake's 1793 poem The Marriage of Heaven and Hell. Huxley recalls the insights he experienced, which range from the "purely aesthetic" to "sacramental vision".[1] He also incorporates later reflections on the experience and its meaning for art and religion.