Mike Tyson reveals what he learned from ‘life kicking my a**’

The two-part documentary “Mike Tyson: The Knockout” came to a conclusion Tuesday night, and the former undisputed heavyweight boxing champ discussed his violent past both in and outside the ring. The documentary ended with “Nightline” anchor Byron Pitts interviewing Tyson, who provided some very candid responses.

“If you could talk to 20-year-old Mike, what would you say to him?” Pitts asked.

“It's gonna hurt,” replied Tyson. “Life is gonna hurt him really bad. I lived in fear. I am from Brownsville, Brooklyn. I'm what fear looks like. Look at me. If you think anybody's afraid of me, I'm probably a thousand times more afraid of them than they are of me. That's why I'm more aggressive than they are.”

Tyson’s boxing career all but ended after he notoriously bit a piece of Evander Hollyfeild’s ear off, but it's his history outside the ring for which he most seeks atonement. Tyson’s ex-wife Robin Givens accused the boxer of being abusive and he spent three years in prison after being convcted of raping Miss Black America contestant Desiree Washington. Now he is working to be a better person.

“Success to me is not cheating on my wife,” Tyson said. “Success for me is not going to prison. Success for me is being responsible and being present. That's success for me.”