One must find out for oneself, and make sure beyond doubt, 'who' one is, 'what' one is, 'why' one is... Being thus conscious of the proper course to pursue, the next thing is to understand the conditions necessary to following it out. After that, one must eliminate from oneself every element alien or hostile to success, and develop those parts of oneself which are specially needed to control the aforesaid conditions.

Magick: In Theory and Practice (ed. Book Sales, 1991)