Sheldon: I brought you some snacks. For Mom, a Bavarian-style pretzel. And for Dad, four Lone Star beers poured into a pitcher to approximate a stein.
George: What do you want?
Sheldon: For starters, a danke wouldn't kill you.
Mary: A what?
Sheldon: It's "thank you" in German. Uh, so, if you were thinking of thanking, then you'd be denken of danken. You're awfully quiet. I assume you're denken.
Mary: W-Where are you going with all this?
Sheldon: If I play my cards right, Germany.

Sheldon: Missy and I broke a lot of rules the other night, and we've received no punishment.
George: [sighs] Buddy, it's been a rough week. We're just glad you're both safe.
Sheldon: But in the absence of a divine being, society's rules are what keeps a person's morality in check.
George: Well, there you go.
Sheldon: No, y-you're not following me. If actions have no repercussions, society breaks down, everything devolves into chaos.
George: You might be overthinking this.
Sheldon: I thought so, too. Then I thought about it, and I'm not.
George: Sheldon, you had one bad night. Just let it go.
Sheldon: But... I did something wrong and I got away with it. That's not okay.
George: Buddy...
Sheldon: Socrates maintained that the man who lies to himself has an enemy living within. He's not even a person. He's just a chaos of selfish desires wrapped in an animal hide.

Sheldon: Unbelievable. It's either cartoons or men in their underwear banging their heads together.
Ricky: You complain a lot.
Sheldon: Excuse me?
Ricky: Seriously, dude, you need to relax.
Sheldon: How can I relax? I'm being held captive in a bacterial playground.

Ms. MacElroy: Now, can anyone tell me why Melville shifts the narrative voice from Ishmael to Ahab? [Ms. MacElroy waits for somebody else to raise their hand] Sheldon.
Sheldon: I have a tummyache. I'd like to see the nurse.
Derek: A "tummyache"?
Sheldon: Yes, Derek, I have a tummy and it aches. Ergo, tummyache.
Derek: Ergo?
Sheldon: It's Latin, Derek.
Ms. MacElroy: Go to the nurse.
Sheldon: And to answer your question, the shifting point of view grants the reader a broader perspective of events than typically allowed by first-person narration.
Ms. MacElroy: Where were we?
Sheldon: And "ergo" is Latin for "hence," Derek.

Dr. John Sturgis: The string theory research they're doing is at the forefront of the field. This is a tremendous opportunity for Sheldon.
Mary: Well, we wouldn't want him to miss out.
George: And you're okay with looking after him all summer?
Dr. John Sturgis: Oh, I won't be there.
Mary: You won't?
Dr. John Sturgis: Oh, no, I'll be presenting a paper in Needles, California. If you're a Peanuts fan, that's where Snoopy's brother Spike lives.

Mary: Sheldon... [sighs] aren't there programs that are closer?
Sheldon: Yes, but I missed my chance to get into any of them. In fact, Dr. Sturgis had to call in a big favor to get this opportunity.
George: Well, that's nice of him, but maybe he should have talked to us first?
Sheldon: Oh, he suggested that.
Mary: And?
Sheldon: I nixed it.
Mary: You nixed it?
Sheldon: From the German nichts. The language lends itself to negativity.

Mary: Well, we're gonna have to talk to Dr. Sturgis before we make any decisions.
George: We're- We're not making any promises.
Mary: Mm-hmm.
George: This is not a yes.
Sheldon: But it's also not a nein, which German for "no", as opposed to the number nine, which is neun.