Why Train?

Dan Edwards, from The Meaning of Strength:

Who can jump the furthest? Who can run the fastest or climb the highest? Who can face the most danger? Who can do the most twists in a somersault..? How could we get to a place in our minds where any of these things actually matter to us? Arbitrary things, all of them: quick to come and quicker to go; easily gained or lost, easily learned or forgotten.