θέλημα

What is Thelema? (US Grand Lodge)
The religion and philosophy of "Do what thou wilt" founded by polymath and prophet Aleister Crowley with the reception of the Book of the Law in 1904 ev. Though many antecedent principles abound, it was this dictation by Aiwass and The Beast's ardent pursuit of its promotion that leaves it so popular today.

While extremely personal and varied, below can be found some examples of the beliefs and practices of Thelemites. (also USGL)

Theology

Customs

Additionally, enjoy this series of videos compiled about the subjects beginning with an introduction on O.T.O.