Oh how I love dialog in old movies. I recently watched "On the Waterfront" by Elia Kazan, starring a young Marlon Brando. Below are some favorite quotes:

Brando in a tough guy voice,
"I always feel I'll live a bit longer without ambition"
"My philosophy on life, do it to him before he does it to you"
"You've lost the battle, but you've got the chance to win the war"
"Never is going to be too much for me shorty"