Michael Corleone: My father taught me many things here - he taught me in this room. He taught me: keep your friends close, but your enemies closer.
Michael Corleone: I know it was you, Fredo. You broke my heart. You broke my heart!
Michael Corleone: If anything in this life is certain, if history has taught us anything, it is that you can kill anyone.
Vito Corleone: I make him an offer he don' refuse. Don' worry.
Kay Corleone: Oh, Michael. Michael, you are blind. It wasn't a miscarriage. It was an abortion. An abortion, Michael. Just like our marriage is an abortion. Something that's unholy and evil. I didn't want your son, Michael! I wouldn't bring another one of you sons into this world! It was an abortion, Michael! It was a son Michael! A son! And I had it killed because this must all end!
[Michael's eyes begin to bulge]
Kay Corleone: I know now that it's over. I knew it then. There would be no way, Michael... no way you could ever forgive me not with this Sicilian thing that's been going on for 2,000 years.
[Michael loses control. He slaps Kay across the face. She falls onto the couch]
Michael Corleone: Bitch! You won't take my children!
Kay Corleone: I will.
Michael Corleone: You WON'T TAKE MY CHILDREN!
Kay Corleone: They're my children too.
Michael Corleone: I don't feel I have to wipe everybody out, Tom. Just my enemies.
Hyman Roth: There was this kid I grew up with; he was younger than me. Sorta looked up to me, you know. We did our first work together, worked our way out of the street. Things were good, we made the most of it. During Prohibition, we ran molasses into Canada... made a fortune, your father, too. As much as anyone, I loved him and trusted him. Later on he had an idea to build a city out of a desert stop-over for GI's on the way to the West Coast. That kid's name was Moe Greene, and the city he invented was Las Vegas. This was a great man, a man of vision and guts. And there isn't even a plaque, or a signpost or a statue of him in that town! Someone put a bullet through his eye. No one knows who gave the order. When I heard it, I wasn't angry; I knew Moe, I knew he was head-strong, talking loud, saying stupid things. So when he turned up dead, I let it go. And I said to myself, this is the business we've chosen; I didn't ask who gave the order, because it had nothing to do with business!
[about the unrest in Cuba]
Michael Corleone: I saw a strange thing today. Some rebels were being arrested. One of them pulled the pin on a grenade. He took himself and the captain of the command with him. Now, soldiers are paid to fight; the rebels aren't.
Hyman Roth: What does that tell you?
Michael Corleone: They could win.
[Vito returns years later to Sicily and meets Don Ciccio, the man who murdered Vito's family]
Don Ciccio: I see you took the name of the town. What was your father's name?
Vito Corleone: Antonio Andolini.
Don Ciccio: You'll have to speak up. I can't hear you
Vito Corleone: My father's name was Antonio Andolini... and this is for you.
Michael Corleone: Fredo, you're nothing to me now. You're not a brother, you're not a friend. I don't want to know you or what you do. I don't want to see you at the hotels, I don't want you near my house. When you see our mother, I want to know a day in advance, so I won't be there. You understand?
The early life and career of Vito Corleone in 1920s New York is portrayed while his son, Michael, expands and tightens his grip on his crime syndicate stretching from Lake Tahoe, Nevada to pre-revolution 1958 Cuba.