The Vision and the Voice (Liber 418) is a book by Aleister Crowley (1875–1947). It chronicles the mystical journey of the author as he explored the 30 Enochian aethyrs originally developed by John Dee and Edward Kelley in the 16th century. These visions took place at two times: in 1900 during his stay in Mexico, and later in 1909 in Algeria in the company of poet Victor Benjamin Neuburg. Of all his works, Crowley considered this book to be second in importance behind The Book of the Law, the text that established his religious and philosophical system of Thelema in 1904. It was first published in 1911.
