Cimarron Kid 
Buy this movie now
Bill Doolin: I've got a rule of my own that might do you good to remember: there will be no killing unless it's forced upon us.
Warden: Hate gets under a man's skin. It spoils his whole life. It's like a bad growth, kid. You got to get rid of it.
"Cimarron Kid Quotes." Quotes.net. STANDS4 LLC, 2014. Web. 10 Mar. 2014. <http://www.quotes.net/movies/Cimarron Kid>.