Sometimes God gives instructions that go against conventional wisdom, such as treating people kindly when they're hateful. Who really wants to do that? Instructions like that may not always make sense, so that's why I need to trust and obey the One who inspired them.

As a matter of fact, there was a period of time, especially in my first career, when that's the only one who would work out with me: my dogs. As you get better and better working out, there's no one who can keep up with you running.

If you can look in your mother's eyes and she's proud of you, then you're a champion.

Today the biggest decisions I make aren't related to the heavyweight title. They are whether I visit McDonalds, Burger King, Wendy's, or Jack-in-the-Box.

Just look at the great Nelson Mandela. He came out of prison and saved his entire country. Some of the best people in the world have spent time in prison.

A hero is someone right who doesn't change.

It's great to reminisce about good memories of my past. It was enjoyable when it was today. So learning to enjoy today has two benefits: it gives me happiness right now, and it becomes a good memory later.