Chuck Norris' reply when asked if Walker the Texas Ranger could be president, in an interview by BarelyPolitical.com (5 December 2007) http://www.youtube.com/watch?v=9bmzPkCVhj8
Famous Chuck Norris Quotes
“Men are like steel — when they lose their temper, they lose their worth.”
Though often attributed to Norris, this seems to have appeared as an anonymous proverb at least as early as 1961, in an edition of The Physical Educator
Misattributed
YouTube video http://www.youtube.com/watch?v=qsioTKqXfi0
Posted on Chuck Norris' website in 2005.