The ‘Worst Man in the World’ Tells the Astounding Story of His Life in Articles by Aleister Crowley.

“In my textbook, Theory and Practice of Magick will be found the definition of the word magic, or magick, as I prefer to spell it, to distinguish the real from the fake.

It is ‘the science and art of causing change to occur in accordance with the will.'” [via, also]