Adult Sheldon: I eventually made my peace with having a room to myself. And I was never truly alone, thanks to my science posse: Stephen, Albert, Richard and Arthur. But for those times when I did need to communicate with Missy, we had a system.
[Sheldon pulls on a rope which pulls a lever which knocks on Missy's wall, prompting her to pick up a walkie talkie]
Missy: [over radio] What?
Sheldon: Just testing the system.
Missy: You tested it yesterday.
Sheldon: Just because it worked yesterday doesn't mean it's working today.
Missy: It's working. Good night.
Sheldon: Good night. Sleep tight. [knocking on wall]
Missy: [over radio] What?
Sheldon: Did you know when people say "sleep tight," they're referring to when beds were made of ropes, and the tighter the rope, the more comfortable the bed was to sleep on?
Missy: Cool. Bye.
Adult Sheldon: My sister wasn't always a fan of my informative tidbits, so I didn't tell her that the entire phrase, "Good night, sleep tight, don't let the bedbugs bite" is actually from the book What They Say in New England: A Book of Signs, Sayings, and Superstitions. Until I told her. [knocking on wall]

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.

Missy: I know what you're doing.
Sheldon: Yes, I'm being thorough about these things so we don't fight about them down the line.
Missy: What you're doing is dragging this out because you don't want me to leave.
Sheldon: No, I'm not.
Missy: Yes, you are.
Sheldon: Do you know the phrase "pish posh"?
Missy: No, and I don't want to.
Sheldon: It's British, and it's used when someone's opinions are absurd. And you're forcing me to use it. Pish posh! Or, more authentically, [English accent] pish posh!
Missy: I'm done. I know what's mine, and I'm taking it.
Adult Sheldon: One day she said the same thing to her first husband. I like to think I prepared her for that moment.

Adult Sheldon: I've always had a curious affinity for Laundromats. Perhaps it's the rows of mechanical devices dedicated to a cleaner world. Or maybe it's the hypnotic rotation of spinning clothes on their sudsy journey to a fluffy, stain-free future. Mmm, look at 'em. Where was I? Oh, yes. Laundromats. My meemaw also loved them, but for an entirely different reason.
Meemaw: Banana, banana... Whoo! [laughs]
Adult Sheldon: Personally, I don't care for bananas. It's a texture thing.

Sheldon: Fun fact... did you know the knife goes on the right because it was the first utensil, and most people are right-handed?
Missy: Did you know I set the table and no one said thank you?
Sheldon: No one thanked me for my fun fact. You don't hear me complaining.