Life is the greatest experiment. Each of us is an experiment of one-observer and subject-making choices, living with them, recording the effects.

Happiness is different from pleasure. Happiness has something to do with struggling and enduring and accomplishing.

The answer to the big questions in running is the same as the answer to the big questions in life: Do the best with what you've got.

Everyone is an athlete. The only difference is that some of us are in training, and some are not.

Running is just such a monastery- a retreat, a place to commune with God and yourself, a place for psychological and spiritual renewal.

Sweat cleanses from the inside. It comes from places a shower will never reach.

Listen to your body. Do not be a blind and deaf tenant.

The real competition is against the little voice inside you that wants to quit

The difference between a jogger and a runner is an entry blank.

Out on the roads there is fitness and self-discovery and the persons we were destined to be.

I will not last forever. But I am damn well going to know I have been here.

Truth can be outraged by silence quite as cruelly as by speech.

Ask forgiveness, not permission. But make sure you bring your results with you.

Would the last animal, eating garbage and living on the last scrap of land, his mate dead, would he still forgive you?

Achieving something that has never existed in manned spaceflight and that is high volume and public access.

Doubt is only removed by action. If you're not working then that's where doubt comes in.

To wrong those we hate is to add fuel to our hatred. Conversely, to treat an enemy with magnanimity is to blunt our hatred for him.

Apparently there is nothing in the news that falls between inhuman acts of horror and kittens.

Reality is based on perception

I know of only three people who really understand money. A professor at another university. One of my students. And a rather junior clerk at the Bank of England.

The day that I can land at the airport in Baghdad and ride in an unarmed car down the highway to the Green Zone is the day that I'll start considering withdrawals from Iraq.