Weeks and months are needed to accustom oneself to climbing. Otherwise, much energy is lost in clinging to the rock, maintaining too sure a hold, trying not to be too stiff, and worrying. After a while a climber warms to the mountains and can accomplish with little effort those things that once took all he had, for height gradually loses its meaning. Standing on the edge of a two-thousand-meter precipice becomes no less comfortable than sitting in a wicker chair on Capri, for it is possible to acquire some of the self-possession that enables mountain goats to stand for hours on a tiny ledge above an abyss.