If someone had said to me before I started doing this that a human being is capable of running 100 miles nonstop, I would have just said: 'No way. I mean, how?' If you just go out there and run 100 miles, it breaks down a lot of barriers in terms of self-imposed limitations.

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.

Regardless of how distant your dreams may seem, every second counts.

The human body is capable of amazing physical deeds. If we could just free ourselves from our perceived limitations and tap into our internal fire, the possibilities are endless.

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.

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.

I never feel more alive than when I'm in great pain, struggling against insurmountable odds and untold adversity. Hardship? Suffering? Bring it!