George Sr.: What made you and your wife call it quits?
Principal Petersen: George, let me tell you something. Getting divorced sucks.
George Sr.: I know.
Principal Petersen: You don't. If you think you're upset about a $500 scratcher, try sitting home alone with half your money gone.
George Sr.: I thought you were gonna say something about love and vows.
Principal Petersen: Half, George. And it wasn't a lot when it was a whole.
George Sr.: I said I'd buy your drinks.
Principal Petersen: Well, thank you. Wings wouldn't hurt, either.

Sheldon: You wanted to see me?
Principal Petersen: When don't I want to see you, Sheldon? Come in. I have something I'd like to give you. This is a key to the faculty restroom. No students allowed. One person at a time. And unlike the other restrooms, this one gets cleaned every night.
Sheldon: Thank you.
Principal Petersen: No, Sheldon. Thank you.
Sheldon: You're welcome.

[on the "Why Sheldon Cooper Should Go to College" tape:]
Principal Petersen: A student like Sheldon comes along... once in a lifetime. This school is not gonna be the same without him. But I know he's gonna do great things. And I'm honored to have been a small part of it.

George Sr.: Hey, Tom, you got a minute?
Principal Petersen: Pretty busy. Make it quick.
George Sr.: It turns out I don't need that raise.
Principal Petersen: What happened, you win the lottery?
George Sr.: No, no.
Principal Petersen: Aw, George, I am so sorry.
George Sr.: Well, what can you do?
Principal Petersen: Listen, I cleared your raise already, why don't you just keep the money.
George Sr.: Oh, no, I couldn't do that.
Principal Petersen: No. No, I mean it. It's yours.

Adult Sheldon: Scientific rivalries are a fact of life. When two competing scientists work on a project, it can devolve into an intellectual boxing match. Over the years, there's been a few classic heavyweight bouts. Newton and Leibniz. [bell ringing] Tesla and Edison. And in a lesser-known but equally brutal bout...
[fantasy:]
Announcer: Linkletter versus Sturgis, The Tussle with No Muscle. Let's see how they stack up in a tale of the tape. In the wire frame glasses, the Eureka from Topeka, Grant Linkletter. IQ: 159. Papers published: 272. Bedtime: 8:30. And his opponent, in his favorite sensible shoes, The Brain from Maine, John Burgess Sturgis! IQ: 162. Papers published: 221. Bedtime: 7:45 on weekdays, 9:00 on Saturday night. Fasten your thinking caps and let's get it on.

Dr. Linkletter: I cannot work with that creepy little know-it-all one more day.
President Hagemeyer: I-I'm sorry, but are we talking about Sheldon or Sturgis?
Dr. Linkletter: Sturgis. Well, both, but mostly Sturgis.
[cut to:]
Dr. John Sturgis: He's not interested in anyone else's input.
President Hagemeyer: I-I'm sorry, Sheldon or Linkletter?
Dr. John Sturgis: Linkletter.
President Hagemeyer: Ah, got it. Continue.

Dr. John Sturgis: I was brought in to help but Dr. Linkletter doesn't value my input.
President Hagemeyer: Oh, I hear you. That must be tough.
[cut to:]
Dr. Linkletter: Ever since he was brought back, he contradicts everything I say.
President Hagemeyer: I hear you. That must be tough.
[cut to:]
Sheldon: There was a time when their arguing brought out the best in them, but now it's just hindering our work.
President Hagemeyer: I hear you. That must be tough.