Crowley's great work was to combine a nonsense mess of metaphysics with sex magick, drugs, and methods purloined from Asian mystics. He preached absolute liberty, but he demanded total obedience. His theory was the liberation of the will, but his practice was the liberation of the animal passions. He idolized a romantic Lucifer and thought himself a magical atheist, but his innate metaphysics were still those of a Christian. This unity of opposites makes his system powerfully destructive.
While he seemed immune to his own evil, he left a trail of madness and suicide behind him.