I've raced on all seven continents at least twice. I've probably run thousands of races. But the single race that I'm most proud is a 10K. Yes, a 10K. I ran it with my daughter on her 10th birthday.

I do a lot of marathons as training runs. If I'm somewhere and there's a marathon, I'll sign up and just go run it.

People think I'm crazy to put myself through such torture, though I would argue otherwise. Somewhere along the line we seem to have confused comfort with happiness... Dostoyevsky had it right: 'Suffering is the sole origin of consciousness.' Never are my senses more engaged than when the pain sets in. There is a magic in misery. Just ask any runner.

Running is a simple, primitive act, and therein lays its power. For it is one of the few commonalities left between us as a human race.

I run because it always takes me where I want to go.

Once you permit yourself to compromise, you fail yourself.

I have my whole office set-up at waist level; I don't sit at all during the day. Sitting, to me, is the devil.