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.

Don't confuse comfort with happiness.

Some seek the comfort of their therapist's office, other head to the corner pub and dive into a pint, but I chose running as my therapy.

Listen to everyone, follow no one.

I love surfing, rock climbing, cycling - all that stuff. But it's just amazing that I can inspire people with my running. It's humbling, really.

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.

Most dreams die a slow death. They're conceived in a moment of passion, with the prospect of endless possibility, but often languish and are not pursued with the same heartfelt intensity as when first born. Slowly, subtly, a dream becomes elusive and ephemeral. People who've lost their own dreams become pessimists and cynics. They feel like the time and devotion spent on chasing their dreams were wasted. The emotional scars last forever.