Here is a quote I found in the book "Into Thin Air" (page 185) by Jon Krakauer that I really liked:
"Not only during the ascent but also during the descent my will-power is dulled. The longer I climb the less important the goal seems to me, the more indifferent I become to myself. My attention has diminished, my memory is weakened. My mental fatigue is now greater than the bodily. It is so pleasant to sit doing nothing - and therefore so dangerous. Death through exhaustion is - like death through freezing - a pleasant one." -Reinhold Messner, The Crystal Horizon
