Thelema is a religion based on a philosophical law of the same name, adopted as a central tenet by some religious organizations. The law of Thelema is "Do what thou wilt shall be the whole of the Law. Love is the law, love under will." The law of Thelema was developed in the early 1900s by Aleister Crowley, an English writer and ceremonial magician. He believed himself to be the prophet of a new age, the Æon of Horus, based upon a spiritual experience that he and his wife, Rose Edith, had in Egypt in 1904. By his account, a possibly non-corporeal or "praeterhuman" being that called itself Aiwass contacted him and dictated a text known as The Book of the Law or Liber AL vel Legis, which outlined the principles of Thelema. An adherent of Thelema is a Thelemite.