Michael Corleone: Never hate your enemies. It affects your judgment.
Michael Corleone: Just when I thought I was out... they pull me back in.
Michael Corleone: Never let anyone know what you are thinking.
Michael Corleone: Friends and money - oil and water.
Michael Corleone: I, uh, betrayed my wife. I betrayed myself. I've killed men, and I ordered men to be killed. No, it's useless. I killed... I ordered the death of my brother; he injured me. I killed my mother's son. I killed my father's son.
Michael Corleone: When they come... they come at what you love.
Vincent Mancini: Don Lucchesi, you are a man of finance and politics. These things I don't understand. Don Lucchesi: You understand guns? Vincent Mancini: Yes. Don Lucchesi: Finance is a gun. Politics is knowing when to pull the trigger.
Michael Corleone: I feel... I'm getting wiser now. Kay Corleone: The sicker you get, the wiser you get, huh? Michael Corleone: When I'm dead, I'm gonna be really smart.
Vincent Mancini: [in the helicopter] I'd like to take Joey Zasa up in one of these and drop him. Michael Corleone: Joey Zasa is nothing. He's a small-time enforcer. He bluffs, threats, but nothing. You can see him coming a mile away. Vincent Mancini:...
Michael Corleone: Your enemies always get strong on what you leave behind.
Michael Corleone: [after learning of Zasa's assassination] Don't ever give an order like that again. Not while I'm alive. Vincent Mancini: Uncle Mike, it had to be done. You were too sick to make a decision. I got the go ahead from Neri and Connie. M...
B.J. Harrison: [about the pope; before the opera] The Pope's doing exactly what you said he'd do, he's cleaning house. Michael Corleone: He should be careful. It's dangerous to be an honest man.
Don Altobello: The richest man is the one with the most powerful friends.
Don Lucchesi: It's not personal. It's business. Michael Corleone: Very well. You want to do business with me. I will do business with you.
Michael Corleone: [to Mary] I would burn in hell to keep you safe.
Mary Corleone: I'll always love you. Vincent Mancini: Love somebody else.
[delivering a message from Michael Corleone to Don Lucchesi] Calo: Power wears out those who do not have it. [stabs him]
Vincent Mancini: I am your son. Command me in all things. Michael Corleone: Give up my daughter. That is the price you pay for the life you choose.
