An introduction to ceremonial magic and Qabalah by the man believed to be the last living Adept of the Hermetic Order of the Golden Dawn. The Tree of Life , written by the occultist and ceremonial magician Israel Regardie, is the most comprehensive introduction available to the Golden Dawn system of initiation, a movement that greatly influenced modern esoteric traditions. It also serves as an ideal introduction to the numerous complex and obscure mystical writings of Aleister Crowley, whom the author served for a time as a personal secretary, and includes practical exercises for developing the will and the imagination.