in 1904, a text he maintained that he received from a higher entity named Aiwass. This book laid the foundation for Thelema, introducing key concepts such as True Will and the Thelemic law, "Do what thou wilt shall be the whole of the Law".

Crowley's teachings and writings on Thelema expanded throughout his life, incorporating elements from his experiences with the Hermetic Order of the Golden Dawn, his travels to Egypt