Mei-Tung: You didn't account for all the dimensions.
Sheldon: The Calabi-Yau manifold has six dimensions.
Mei-Tung: Only if there's fermions. Without fermions, there could be up to 26 dimensions.
Sheldon: What? Dr. Linkletter and Dr. Sturgis never mentioned 26 dimensions.
Mei-Tung: Who are they?
Sheldon: They're my teachers, and they're really smart.
Mei-Tung: I've never heard of them.
Sheldon: Well, I've probably never heard of your teachers.
Mei-Tung: I recently studied with Henry W. Kendall.
Sheldon: The Nobel Prize winner for his pioneering research on the deep inelastic scattering of electrons on protons and bound neutrons?
Mei-Tung: Yes.
Sheldon: Never heard of him.

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.

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.

Missy: What's it like to not believe in God?
Sheldon: It's great. Big fan.
Missy: Are you ever afraid you're wrong?
Sheldon: About religion? Never. About other things? Also never.

Adult Sheldon: Heidelberg is considered one of the most beautiful cities in Germany. Heidelberg Palace, the Karl Theodor Bridge, the Schloss Schwetzingen. But I couldn't care less. The only sights I wanted to see were the looks of awe on the faces of my fellow students as I demonstrated my intellectual superiority.
Sheldon: Cylinders that are smaller than ten to the minus-35 meters. [all laugh] What's happening?
Professor Salzman: You don't laugh at people saying stupid things in Texas?
Sheldon: You're darn tootin' we do. So who goofed? [laughter]
Professor Salzman: You did, dummkopf.
Sheldon: Dummkopf? You're calling me a dummy?
Professor Salzman: Class, who knows where the dummkopf went wrong? [hands go up] Mr. Ziegler.
Mr. Ziegler: He forgot to consider the Calabi-Yau manifold.
Professor Salzman: Thank you, Mr. Ziegler.
Sheldon: Wait, what's the Calabi-Yau manifold? [laughter]
Professor Salzman: Dummkopf.
Adult Sheldon: I was quickly learning not all Germans were the warm, fun-loving people I was led to believe.

Professor Salzman: One should not even attempt to unify type-one und type-two...
Adult Sheldon: I wanted to give up and run away, but I had read enough comic books to know that heroes don't quit. Instead of running, I decided to stay and face the biggest challenge I've ever had: keeping my mouth shut.
Professor Salzman: Any thoughts on the compactification of the extra dimensions here?
[Sheldon goes to raise his hand along with Mei-Tung, but stops himself]
Adult Sheldon: Mmm.
Professor Salzman: Ja.
Mei-Tung: One must conserve the unbroken supercharges.
Professor Salzman: Und the spherical Hankel transform of this equation is... [Sheldon snaps his pencil]
Adult Sheldon: This turned out to be a pivotal moment in my life. By being open to people smarter than me, I grew as both a man and a scientist. Humble, brilliant... I really am the whole package.

Sheldon: And then they laughed at me for not knowing something that they knew. Who does that?
Mary: You do.
Sheldon: Well, this is no time for a teachable moment. Your child is hurting.
Mary: Sorry. [taps Sheldon's shoulder] There, there.
Sheldon: I guess that'll do. Now, how about a hot beverage?