Examine the opportunities, the challenges you've given yourself.

Be who you are in every situation.

On the £20,000 Mercedes prizes for each winner at the World Athletics Championships in Stuttgart- Anyone good enough to win already has one.

The mind is absolutely instrumental in achieving results, even for athletes. Sports psychology is a very small part, but it's extremely important when you're winning and losing races by hundredths and even thousandths of a second.

All my life I believed I became an athlete through my own determination, but it's impossible to think that being descended from slaves hasn't left an imprint through the generations.

Life is often compared to a marathon, but I think it is more like being a sprinter; long stretches of hard work punctuated by brief moments in which we are given the opportunity to perform at our best.

I believe that it is better to learn from the diverse people around us than to try in vain to emulate them, better to be a teacher than a role model. As strong as my legs are, it is my mind that has made me a champion.