I just won the gold medal and I couldn't eat downtown. I said, 'Something's wrong.' And from then on, I've been a Muslim.

I said to myself, 'the champion of the whole world can whoop every man in Russia, every man in America, every man in China, every man in Japan, every man in Europe - every man in the whole world'.It sounds big, didn't it? So I kept working until I did it.

The outgoing and spontaneous person that the world knew while I was boxing was a persona that I created to sell tickets and promote my career. In my private life, I am quiet and reflective by nature.

Whoever listens to slander is himself a slanderer.

I hated every minute of training, but I said, 'Don't quit. Suffer now and live the rest of your life as a champion.'

When you saw me in the boxing ring fighting, it wasn't just so I could beat my opponent. My fighting had a purpose. I had to be successful in order to get people to listen to the things I had to say.

I predict that this will be the greatest book ever and it will sell more than any other book in history