Scot Boyd at 2011-06-12 15:14:07:

http://www.youtube.com/watch?v=Se8jrJ24Oh8

The above speech is not quoted on IMDB, alas. A couple of bonus lawyer quotes from the same movie:

[Kate offers Lawrence 'greenmail' to drop an unfriendly take-over bid]
Kate Sullivan: Why so uptight? It's not illegal.
Lawrence Garfield: It's immoral. A distinction with no relevance to lawyers. But it matters to me.

Kate Sullivan: Well, for someone who has nothing nice to say about lawyers, you certainly have plenty of them around.
Lawrence Garfield: They're like nuclear warheads. They have theirs, so I have mine. Once you use them, they fuck up everything.

Teddy Pasternak at 2011-06-12 16:27:34:

Legally Blonde (2001). Holland Taylor as Professor Stromwell:

http://www.youtube.com/watch?v=iaQbC5bgh2s

PROFESSOR STROMWELL: "The law is reason free from passion." Does anyone know who spoke those immortal words?

Dorky David raises his hand.

PROFESSOR STROMWELL: Yes?

DORKY DAVID (confidently) Aristotle.

Professor Stromwell approaches him the way Cruella de Ville approaches a puppy.

PROFESSOR STROMWELL: Are you sure?

Now he's not.

DORKY DAVID: Yes?

PROFESSOR STROMWELL: Would you be willing to stake your life on it?

DORKY DAVID: I think so...

PROFESSOR STROMWELL: How about --

She spins around, roughly POKING another student in the head.

PROFESSOR STROMWELL: -- his life?

DORKY DAVID: I don't know.

PROFESSOR STROMWELL: Well, I recommend knowing before speaking. The law leaves much room for interpretation -- but very little for self-doubt.

Francisco Magdaraog at 2011-06-12 18:17:18:

The Verdict
screenplay by David Mamet, adapted from the novel by Barry Reed

Mickey Morrissey: Do you know who the attorney for the Archdiocese is? Ed Concannon!
Frank Galvin: He's a good man.
Mickey Morrissey: He's a good man? He's the Prince of fucking Darkness! He'll have people testifying they saw her waterskiing in Marblehead last summer. Now look, Frank, don't fuck with this case!

http://movieclips.com/gMv4-the-verdict-movie-taking-the-case/

Ferdinand at 2011-06-12 18:31:59:

Liar Liar

http://movieclips.com/NqYWp-liar-liar-movie-and-the-truth-shall-set-you-free/

Fletcher: Mrs. Cole, is this a copy of your driver's liscense?
[shows paper]
Samantha: That's right.
Fletcher: It says here you are a blonde, are you? If you don't remember perhaps Mr. Faulk will.
Samantha: Brunette.
Fletcher: Maybe if we play the tape again, maybe it's on there...
Samantha: I'm a brunette!
Fletcher: Thank you. Now let's see... weight 105? Yeah, in your bra.
Dana: Your honor, I object.
Fletcher: You would!
Dana: Bastard!
Fletcher: Hag!
Judge Stevens: QUIET! Overruled! Weight?
Samantha: 118.
[Fletcher gives her a look]
Samantha: Alright, fine, fine, I'm 127.
Fletcher: Uh, huh, and it says here you were born in 1964, but that's not true either is it? Is it!
Samantha: No.
Fletcher: Please tell the court what's on your birth certificate under Date of Birth.
Dana: Your honor, I object. What does this have to do with anything?
Judge Stevens: Overruled. Mrs. Cole, answer the question.
Samantha: 1965.
Fletcher: Now let get this straight. That means you lied about your age to make yourself older. But why would any woman want to DO THAT?
Samantha: I changed it so I could get married.
Fletcher: AND THE TRUTH SHALL SET YOU FREE! My client lied about her age! She was only 17 when she got married, which makes her a minor. And in the great state of California, no minor can enter into any legal contract without parental consent.
[to Dana]
Fletcher: Including...?
Dana: [sighs] Prenuptual agreements.
Fletcher: Prenuptual agreements! This contract is void! The fact that my client has been riden more than Seattle Slew is irrelevant. Standard Community Property applies and she is entitled to half of the marital assets, or $11.395 million. Jordan fades back, swoosh, and THAT'S THE GAME! Nothing further, your honor!