Huxley also believed that at the base of all the world’s religions there lies a common core of mystical experience he called “the Perennial Philosophy.” Naturally, Huxley’s morning on mescaline confirmed him in all these ideas; as one reviewer of The Doors of Perception put it, rather snidely, the book contained “99 percent Aldous Huxley and only one half gram mescaline.” But it didn’t matter: great writers stamp the world with their minds, and the psychedelic experience will forevermore bear Huxley’s indelible imprint.

