Concepts and ideas from mysticism and bohemianism were inherited by the Beat Generation. When Aldous Huxley helped popularize the use of psychedelics, starting with "The Doors of Perception", published in 1954, Huxley also promoted a set of analogies with eastern religions, as described in "The Perennial Philosophy." This book helped inspire the 1960s belief in a revolution in western consciousness and included the "Tibetan Book of the Dead" as a source. Similarly, Alan Watts, in his opening statement on mystical experiences in "This Is It," draws parallels with Richard Bucke's Cosmic Consciousness, describing the "central core" of the experience as