Based upon academic research at the University of Amsterdam\’s Center for the History of Hermetic Philosophy and Related Currents, One Truth and One Spirit is a much-needed work that covers a previously unexplored history of the modern religious movement known as Thelema. This work details the theoretical framework of Aleister Crowley\’s spiritual legacy in the O.T.O. and the A?A? and covers the years of Thelema since Crowley\’s death in 1947.One Truth and One Spirit approaches a complex topic with a complex history, with exhaustive citations and sources, but it is written for anyone interested in the subject of Thelema. The author utilizes published source material as well as previously unavailable information, which makes this a unique contribution to the available literature.One Truth and One Spirit is expected to be of interest to the novice, the scholar, and the seasoned practitioner of Thelema. The work provides a general historical overview of Thelema from a theoretical vantage point, explores the historical development of the movement from the 1960s to the 1990s, and applies the author\’s own critical discussions on the topic itself.基于阿姆斯特丹大学赫尔墨斯哲学史和相关潮流中心的学术研究,本书涵盖了以往未被探索的现代宗教运动泰勒玛的历史,并详细介绍了 Aleister Crowley 在 OTO 和 AA中的精神遗产的理论框架。泰勒玛的新手、学者和实践者应该会本书感兴趣。该作品从理论的角度提供了泰勒玛的一般历史概述,探索了从 1960 年代到 1990 年代的历史发展,并应用了作者自己对主题本身的批判性讨论。