Magick in Theory and Practice by Crowley, Aleister (1992)

"MAGICK is the Science and Art of causing Change to occur in conformity with Will."

-Aleister Crowley, from the Introduction

Magick in Theory and Practice is Part 3 of Aleister Crowley's four-part masterwork Magick: Liber ABA, Book Four, a foundational resource of modern magick, occultism, and hermeticism. Crowley's unparalleled knowledge of magick (which is defined as the effort, in Wicca and certain other belief systems, undertaken to...