It's both.
>Functioning as an effective group
Anon here are still saying everything including forms of Christianity they don't believe in is "satanic" so good luck.
Crowley
Thelema is written in code.
It was encoded to keep people who weren't ready to understand it from understanfing it. You could read the upanishaads and learn most of the philosophy, or plato or any number of other ancient texts, however they are all mostly written in a sort of code. Many anon can tell you the secrets, which are things like "you are the universe" and things like this, but if you arent open to those ideas us telling you wont help you any.