Below are a few quotes involving Martin Sheen - click the title to view the complete list. If you think their finest moments are missing from the full list, just click "submit something" to submit something new.
Willard: If that's how Kilgore fought the war I began to wonder what they really had against Kurtz. It wasn't just insanity and murder, there was enough of that to go around for everyone.
Willard: Everyone gets everything he wants. I wanted a mission, and for my sins, they gave me one. Brought it up to me like room service. It was a real choice mission, and when it was over, I never wanted another.
Willard: Hey soldier, do you know who's in command here?
Soldier: Ain't you?
President Bartlet: I was watching a television program before, with a kind of roving moderator who spoke to a seated panel of young women who were having some sort of problem with their boyfriends - apparently, because the boyfriends had all slept with the girlfriends' mothers. And they brought the boyfriends out, and they fought, right there on television. Toby, tell me: these people don't vote, do they?
Leo McGarry: How are you doing, Ainsley?
Ainsley Hayes: [Nervous] I'm concerned about peeing on your carpet.
Leo McGarry: Ok, well, now I am too.
Ainsley Hayes: Can I use your bathroom?
Leo McGarry: Sure.
[She walks into the closet.]
President Bartlet: Where is she?
Sam Seaborn: In the closet.
President Bartlet: Come on out Ainsley. What were you doing in the closet?
Ainsley Hayes: I had to pee.
President Bartlet: They wont let me smoke inside, but you can pee in Leo's closet.
C.J.: Sorry to ask you this, sir, but...
President Bartlet: Not too late to stop yourself.
C.J.: I need you to pardon a turkey.
President Bartlet: I already pardoned a turkey.
C.J.: I need you to pardon another one.
President Bartlet: Didn't I do it right?
C.J.: You did it great, but I need you to come out here and pardon another one.
President Bartlet: Aren't I going to get a reputation for being soft on turkeys?
C.J.: Sir, can you come out here and just get this over with?
President Bartlet: No, I'm not gonna just get this... What the hell's going on?
C.J.: They sent me two turkeys. The more photo-friendly of the two gets a Presidential pardon and a full life at a children's zoo. The runner-up gets eaten.
President Bartlet: If the Oscars were like that, I'd watch.
C.J. Cregg: What are you taking?
President Josiah Bartlet: I don't know. My wife hands me pills, I swallow them with water.
Sam Seaborn: Sir?
President Josiah Bartlet: Vitamin C, Vitamin B. Is it possible I'm taking something called euthanasia?
Sam Seaborn: Echinacea?
President Josiah Bartlet: Ah, that sounds more like it.
President Josiah Bartlet: What's next?
John Van Dyke: If our children can buy pornography on any street corner for five dollars, isn't that too high a price to pay for free speech?
President Josiah Bartlet: No.
John Van Dyke: Really?
President Josiah Bartlet: On the other hand, I think that five dollars is too high a price to pay for pornography.
John Van Dyke: The First Commandment says Honor thy father.
Toby Ziegler: No it doesn't
Josh Lyman: Toby...
Toby Ziegler: It doesn't.
Josh Lyman: Listen...
Toby Ziegler: No if I'm going to make you sit through this preposterous exercise, we're going to get the names of the damn commandments right.
Mary Marsh: Okay. Here we go.
Toby Ziegler: Honor thy father is the Third Commandment.
John Van Dyke: Then what's the First Commandment?
President Josiah Bartlet: I am the Lord your God. Thou shalt worship no other god before me. Boy, those were the days, huh?
President Josiah Bartlet: I'm going to find out anyway. What I lack in memory, I more than make up for with exceptional powers of deductive reasoning.
President Josiah Bartlet: My daughters are here?
Abbey Bartlet: Are you kidding? Ellie's wearing makeup.
President Josiah Bartlet: Well, I don't approve of that.
Abbey Bartlet: You understand she's 27, right?
President Josiah Bartlet: I don't approve of that, either.