Nature's arena has a way of humbling and energizing us.

We move forward, but we must stay in the present.

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

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.

We strive toward a goal, and whether we achieve it or not is important, but it's not what's most important. What matters is how we move toward that goal.

Only the most saintly and delusional among us welcomes all pain as challenge, perceives all loss as harsh blessing.

Nature's arena has a way of humbling and energizing us.