"Never Quit. Don't ever, ever quit. Recognize that stopping now, regrouping to try a new approach isn't quitting. If you quit you'll regret it forever." Rudy Ruettiger.
There is a story of a man named Aron Ralston, a mountain climber. Aron lived for the wilderness, to be out there in the wild, alone and climbing. The more remote the place the better, such was his desire for solitude that he often wouldn’t even tell anyone where he was going.
One day he was climbing in a remote part of the Utah desert, as he put his weight on a lose boulder it came crashing down into a crevice, crushing and trapping his right arm. Miles from civilsation and with only a backpack of equipment, Aron was trapped in that crevice for days.