" But there are men for whom the unattainable has a special attraction. Usually they are not experts: their ambitions and fantasies are strong enough to brush aside the doubts which more cautious men might have. Determination and faith are their strongest weapons. At best such men are regarded as eccentric; at worst, mad . . . Three things these men have in common: faith in themselves, great determination and endurance. * "

― Bear Grylls , Facing Up: A Remarkable Journey to the Summit of Mount Everest