But this is a general objection of the sceptical sort to all miracles of whatever kind, and leadeth anon into the quagmire of arguments about Free Will. The Adept will do better to rely upon The Book of the Law , which urgeth constantly to action. Even rash action is better than none, by that Light; let the Magician then argue that his folly is part of the natural order which worketh all so well.—Liber DCXXXIII De Thaumaturgia

The Great Work is the uniting of opposites. It may mean the uniting ofthe soul with God, of the microcosm with the macrocosm, of the femalewith the male, of the ego with the non-ego—or what not.