There are many reasons everyone should travel the world: It’s the antidote to the poison of prejudice. You learn to become comfortable — or at least tolerate — of things that once scared you; the world is a pretty stunningly beautiful place.
Benjamin Franklin nailed it when he said, "Fatigue is the best pillow." True story, Benny. There's nothing like pushing your body so far past exhaustion that you'd willingly, even longingly, take a nap on a concrete slab.