Gary: I believe we have to look to gravity and its magnitude...
Adult Sheldon: I was really doing my best to hold it together.
Gary: ...could be a repulsive force if you just add negative mass.
Adult Sheldon: I smiled and nodded like my meemaw's Houston Oilers bobblehead.
Gary: And I also discovered a way that we could predict the masses of all the known particles using the Egyptian pyramids.
Adult Sheldon: In physics, there's a phenomenon known as supercritical assembly. If you bring enough material together in one place...
Gary: The trick is numerology.
Adult Sheldon: ...in the right configuration, eventually, it will explode.
Gary: This is fun. Not a lot of people I can talk to scientist-to-scientist.
Sheldon: We're not talking scientist-to-scientist. You're not a scientist. You're just a rich man that no one will be honest to because everyone wants your money.
President Hagemeyer: Oh, don't listen to him. I mean, he's just a kid. Why don't you tell me a little more about your pyramid thingy? Huh?

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.

Pastor Jeff: Come on up here, Sheldon. Let's hear what you got.
Sheldon: I've spent the last week studying what people believe, and I've come to a conclusion.
Pastor Jeff: And what's that?
Sheldon: I'm starting my own religion.
Pastor Jeff: I'm sorry, what?
Sheldon: I'm calling it Mathology. It's based on a universal binary system.
Pastor Jeff: That's terrific, Sheldon, but this is a Baptist Sunday school.
Sheldon: I know, I'm here to convert everybody. Any takers?
Pastor Jeff: Okay. Let's go have a talk with your mom.
Sheldon: The only sin in Mathology is being stupid.

Mary: Too bad. We are going.
Sheldon: Class is starting tomorrow. I'm not going anywhere.
Mary: Sheldon, do not argue with me. You are going home.
Sheldon: Mom, the people of Germany are obsessed with rules and devoid of humor. I am home.

Meemaw: Where we eating tonight?
Dale: Well, that depends. Why don't you look in the glovebox and check on the Tums situation.
Meemaw: There's five.
Dale: Oh, my, this is tricky. Well, Mexican's at least three apiece.
Meemaw: We might get by with two each if it's Italian.
Dale: You get red wine and then tomato sauce. Hey, if they put lemon in the water, we're dead.
Meemaw: Hmm. That leaves barbecue.
Dale: Sold.
Meemaw: Who gets Tum number three?
Dale: Me. They're my Tums.

Georgie: See? They ain't allowed to dance, either.
Missy: It's like I'm watching my life.
Georgie: That's how I feel when I'm watching Top Gun.

Dale: Now, what do you think young people talk about on their dates?
Meemaw: I don't know. But my knee's telling me it's gonna rain this weekend.