My favorite quote from Reinhold Messner who soloed Everest, did it without supplemental O2, etc... "When I rest I feel utterly lifeless except that my throat b

My favorite quote from Reinhold Messner who soloed Everest, did it without supplemental O2, etc... "When I rest I feel utterly lifeless except that my throat burns when I draw breath...I can scarcely go on. No despair, no happiness, no anxiety. I have not lost the mastery of my feelings, there are actually no more feelings. I consist only of will." - Messner on the first solo ascent of Everest Outside of Everest itself, I'm not sure there is much that can compare except other climbs at similar altitudes.