Mike Tyson says one self-talk lesson he learned as a kid shaped his boxing career

"I had to learn that at 12 to be the champion at 20," Mike Tyson, now 59, said.

"I had to learn that at 12 to be the champion at 20," Mike Tyson, now 59, said.

"I had to learn that at 12 to be the champion at 20," Mike Tyson, now 59, said.