I always liked running as a kid. You know how eating chocolate or ice cream makes you feel good? That's the same way that running and competing makes me feel.

I won't back down. I get a satisfaction from being tested and defeating the test.

Last year I was the favorite going into the world champs in Beijing, but I felt like I had to do something phenomenal in order to win. Instead of just having fun and competing, it became "I want to win so bad." But the person who wants it the most doesn't win. It's the person who executes. I still look back on that 200-meter race and say what the hell happened? I wasn't hurt, I wasn't sick, the conditions were perfect, and I ran like total crap.

There's never going to be a decathlon that you're going to have 10 events that your satisfied with. You're always, always going to be dissatisfied in something, and that always draws you back to try to retry that the next time you do a decathlon. It's like you go for the perfect 10.

I think a challenge for myself is to see how many times I can get above 9,000. That would be a good challenge.

You can't really explain competing in Olympic event to someone. You can say, "Oh, that was really tough." And that literally means nothing to someone. If you can give some sort of comparison, because that's really all track and field is about any way....Usain Bolt runs a time and you get to see what everybody else's time is. It would just be interesting to compare Olympians to somebody who doesn't train their whole life.

Competition is pretty much the essence of everything, it gives humans drive.