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

Every single one of us possesses the strength to attempt something he isn't sure he can accomplish.

It's a hard, simple calculus: Run until you can't run anymore. Then run some more. Find a new source of energy and will. Then run even faster.

As powerful as our legs are, as magnificent as our lungs and arms and muscles are, nothing matters more than the mind.

Overcoming the difficulties of an ultramarathon reminds me that I can overcome the difficulties of life

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.

Every single one of us possesses the strength to attempt something he isn't sure he can accomplish. It can be running a mile, or a 10K race, or 100 miles. It can be changing a career, losing 5 pounds, or telling someone you love her (or him).