Who said "Defeat is not final unless you accept it as such."?

This quote is attributed to Mike Tyson.

Defeat is not final unless you accept it as such. - Mike Tyson

"Defeat is not final unless you accept it as such."

Mike Tyson Perseverance

Professional Boxer American Born 1966 (age 60)

"Discipline is doing what you hate to do, but nonetheless doing it like you love it."

"Fear is only in the mind."

"I'm the best ever. I'm the most brutal and vicious, and most ruthless champion there has ever been."

"You must believe in yourself when no one else does."

"Perseverance is the key to success."

"Don't give up on what you believe in."

"I've been through worse."

"You learn to live with the pain."