Destiny is an absolutely definite and inexorable ruler. Physical ability and moral determination count for nothing. It is impossible to perform the simplest act when the gods say "No." I have no idea how they bring pressure to bear on such occasions; I only know that it is irresistible. One may be wholeheartedly eager to do something which is as easy as falling off a log; and yet it is impossible.

Ch. 48. - The Confessions of Aleister Crowley (1929)