Jana: I think I'm gonna go.
Georgie: Okay.
Sheldon: Hola, senorita. She's in my Spanish class.
Jana: I'll call you later.
Sheldon: Te veo manana en la clase de espanol.
Jana: What?
Sheldon: That means, "See you tomorrow in Spanish class." I was going to ask how you thought you did on Friday's quiz, but I'm guessing the answer is no bueno. Adios.

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.

Adult Sheldon: None of my friends had recorded the episode. I called Tam. I called Dr. Sturgis. Those were all my friends.

Adult Sheldon: Fortunately, having a modem granted me access to an even better kind of friend: the kind you don't have to see or talk to.

Adult Sheldon: Many inventions changed people's lives for the better: the light bulb, the polio vaccine, and one that doesn't get enough credit, the home video cassette recorder. It didn't help keep people out of wheelchairs, but it did keep me from missing Star Trek.