" The more improbable the situation and the greater the demands made on [the climber], the more sweetly the blood flows later in release from all that tension. The possibility of danger serves merely to sharpen his awareness and control. And perhaps this is the rationale of all risky sports: You deliberately raise the ante of effort and concentration in order, as it were, to clear your mind of trivialities. "

― Jon Krakauer , Into Thin Air: A Personal Account of the Mount Everest Disaster