I'm the world heavyweight champion. I consider myself a citizen of the whole world.

Changing your nature is the hardest thing to do. But I discovered that you can be who you choose to be.

Boxing is like jazz. The better it is, the less people appreciate it.

Forgiveness is that subtle thread that binds both love and friendship. Without forgiveness, you may not even have a child one day.

Its very important that people know that I really enjoy everything that has happened to me. And I tell my kids... youre not going to be the tallest, fastest, prettiest, the best track runner, but you can be the nicest human being that someone has ever met in their life. And I just want to leave that legacy that being nice is a true treasure.

Growing up poor, I didn't even have a lunch to take to school.

Nobody can do everything well, so learn how to delegate responsibility to other winners and then hold them accountable for their decisions.