Humans aren't built to sit all day. Nor are we built for the kinds of repetitive, small movements that so much of today's specialized work demands. Our bodies crave big, varied movements that originate at the core of our body.

For me, challenging myself with this type of endeavor [ultramarathons] brings the best out in me because even at the darkest, deepest moments when I feel like I can't go on, when I feel like there's no chance I could break the record or much less finish the trail, somehow I find that strength inside of me.

You can hurt more than you ever thought possible, then continue until you discover that hurting isn't that big a deal.

The point was living with grace, decency, and attention to the world, and breaking free of the artificial constructs in your own life.

Rational assessments too often led to rational surrenders.

Train at your current fitness level, or slightly above — not where you want to be.

We can live as we were meant to live - simply, joyously, of and on the earth. We can live with all our effort and with pure happiness.