Aleister Crowley (originally Edward Alexander Crowley) (1875-1947), British magus who promoted magic as a spiritual discipline, founded the philosophy-religion Thelema, and designed the Thoth Tarot.
«I swore to rehabilitate MAGICK, to identify it with my own career; and to compel mankind to respect, love, and trust that which they scorned, hated and feared.» -- Magick in Theory and Practice