Quotes from The Godfather Part I

Luca Brasi: Don Corleone, I am honored and grateful that you have invited me to your daughter... 's wedding... on the day of your daughter's wedding. And I hope their first child be a masculine child. I pledge my ever-ending loyalty.

Sonny: Goddamn FBI don't respect nothin'.

Michael: My father is no different than any powerful man, any man with power, like a president or senator.
Kay Adams: Do you know how naive you sound, Michael? Presidents and senators don't have men killed.
Michael: Oh. Who's being naive, Kay?

Michael: My father made him an offer he couldn't refuse.
Kay Adams: What was it?
Michael: Luca Brasi held a gun to his head, and my father assured him, that either his brains or his signature would be on the contract. 
Kay Adams: ...
Michael: ...That's a true story. That's my family Kay, it's not me.

Michael: Fredo, you're my older brother, and I love you. But don't ever take sides with anyone against the Family again. Ever.

[Tessio brings in Luca Brasi's bulletproof vest, delivered with a fish inside]
Sonny: What the hell is this?
Clemenza: It's a Sicilian message. It means Luca Brasi sleeps with the fishes.

Don Corleone: I'm gonna make him an offer he can't refuse.

Michael: It's not personal, Sonny. It's strictly business.

Don Corleone: Someday - and that day may never come - I'll call upon you to do a service for me. But until that day, accept this justice as gift on my daughter's wedding day.

Sonny: We don't discuss business at the table.

Don Corleone: I never wanted this for you. I work my whole life - I don't apologize - to take care of my family, and I refused to be a fool, dancing on the string held by all those bigshots. I don't apologize - that's my life - but I thought that, that when it was your time, that you would be the one to hold the string. Senator Corleone; Governor Corleone. Well, it wasn't enough time, Michael. It wasn't enough time.
Michael: We'll get there, pop. We'll get there.

Kay: Michael, is it true? Did you have Carlo murdered?
Michael: Don't ask me about my business, Kay.

Clemenza: Leave the gun. Take the cannolis.

Sonny: How's Paulie?
Clemenza: Oh, Paulie... won't see him no more.

Clemenza: All right, you just shot 'em both. Now what do you do?
Michael: Sit down and finish my dinner.

Don Corleone: Never let anyone outside the family know what you're thinking.