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?

Mary: Let's say grace.
Sheldon: Hang on, safety first. [puts mittens on]
George Jr.: When are you gonna get over that?
Sheldon: I would think recent events would make you value protection.
Mary: Enough.

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.

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

George Sr.: Come on, Sheldon, think of it as a free dinner.
Sheldon: I'm a kid. All my dinners are free.

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.