This is a rush transcript from "Your World," March 11, 2015. This copy may not be in its final form and may be updated.
NEIL CAVUTO, HOST: Floyd Mayweather, Manny Pacquiao are about to sit down before they duke it out, and the hype, you know, off the charts. Is boxing back?
It's something my next guest should know. He fought with some of the legends, a legend himself, in fact, regarded by Ring magazine and so many able authorities as one of the 10 best heavyweight champions of all time, in fact, according to Sports Illustrated, one of the best sports figures of all time.
And he's a fairly modest guy, former heavyweight champion of the world, George Foreman.
George, good to have you. Thanks for coming.
GEORGE FOREMAN, CO-CHAIRMAN, GEORGE FOREMAN ENTERPRISES: Hey, I'm always happy to be with you, my friend.
CAVUTO: You know, I'm looking at the purse on this fight, and I almost have to do a double-take that, when all is said and done, with pay-per-view revenues and the like, it's not out of the question that each of these guys each walk away with $100 million and then some. That seems ridiculous. Is it?
FOREMAN: Yes, you know, with boxing, that old saying, that they gathered much had none over, keep that in mind with boxing purses.
CAVUTO: Yes. Yes.
FOREMAN: It was 44 years ago that Bob Arum gave Muhammad Ali and Joe Frazier $2.5 million, unheard of at that time. Believe me, it was only enough to last until their next purse.
CAVUTO: What happens? You have been very good at building on your financial empire long after leaving the ring. You have returned a couple of times.
But obviously you made a lot of money in the ring, you made a lot of money after the ring. But a lot of these guys don't. And Mayweather is -- he's like -- reminds me of Tyson, in a way, that he gives a lot of money away, he's very generous, but very flashy, buys Mercedes and all this stuff for friends and all, which is fine, but it's a quick way to go through that cash, isn't it?
FOREMAN: Oh, you got to do it. They say fast women and slow horses. It won't last long.
FOREMAN: It's not going to last long.
But, oh, the thrill to be a part of something like that, to go into the ring that night and everybody is cheering one way and the other. You have to live through that. It's more valuable than the purse you will receive.
CAVUTO: Yes. I'm always thinking of you and the Rumble in the Jungle and the great fight with Muhammad Ali. You have said you have watched video of that fight or film, I guess, hundreds of time. It always has the same ending. Does it stick with you?
FOREMAN: Yes. I keep thinking that I'm going to win.
CAVUTO: I have got to win this time. But I never win.
CAVUTO: It's all psychological, too, isn't it? I know, when these two guys get into the ring, I don't know whether they personally like or don't like each other.
But I know Ali was getting on your nerves before that fight. You were getting on his, because, I mean, his own trainer was telling him, hey, this Foreman guy, he just might kill you.
CAVUTO: How does that go -- come into play, George?
FOREMAN: It is strange, because, as the years go by, we -- I hated the guy. And the guy didn't particularly like -- care for me anyway.
FOREMAN: But, as the years have gone by, we are the oldest friends we have. You love each other. You want to call each other. You want to take -- I was with on the face -- what is it, FaceTiming him the other day for my birthday.
You realize, boy, if I had only been a little close, a little more affection -- things would have been affectionate. I would have been better off. My best friend now.
CAVUTO: What happens when you come out of the ring?
The first time, you had so many lives, George. If you think about it, you had been angry, surly, knock everyone out in a round or two guy in the early career. Then you come back. You're this grandfatherly, loving -- everyone felt some attachment to you.
And then you went into the Foreman Grill stuff and you were hawking McDonald's and all this stuff. Anything you attached your name to was easy money. Is that where you are at now, the easy money stage?
FOREMAN: You know what? You had -- I had 10 years out of the boxing and you realize, if you don't learn to sell, you're going to starve.
So what do you do? You manufacture a smile. And after a while, you manufacture and you realize you have got to carry 24/7. You're going to have to be nice to people if you want them to buy you and your stuff.
CAVUTO: Wait a minute. Are you saying that's just a manufactured smile? It's fake?
FOREMAN: You have got to -- you go around the corner, you manufacture your stomach muscle. You see the guys with the six-packs? Manufactured. You work on it.