Mary: How do they feel?
Sheldon: My brand loyalty is being severely tested.

Sheldon: Oh, I'm assuming you heard the bad news.
Mary: What news?
Sheldon: Isaac Asimov died.
Mary: Oh, no, is that one of your school friends?
Sheldon: What? No, he's one of the most prolific science fiction writers in the history of the genre.
George Sr.: Never heard of him.
Sheldon: Sure you have. He wrote I, Robot, the Foundation trilogy.
George Sr.: Nope.
Sheldon: Nightfall? The Posotronic Man?
George Sr.: You ever heard of this guy?
Mary: Mm-mm.
Sheldon: Caves of Steel. Hostess. The Naked Sun?
George Sr.: Whoever he is, sorry he died. Gotta go. Bye.
Mary: Bye.
Adult Sheldon: Astonishing. Asimov wrote almost 500 books, which was apparently 500 more than my family had read.

Sheldon: Dad.
George Sr.: What the hell are you doing here?
Sheldon: I need to talk to you.
George Sr.: How'd you even find me?
Sheldon: It's not like you come home smelling like coffee.

Ms. Hutchins: Hi, Sheldon, what can I do for you?
Sheldon: Do you have any books or videos on the Lamaze technique?
Ms. Hutchins: Uh-oh. Georgie get that girl pregnant?
Sheldon: It's for me. I need to have a tooth pulled, and I'd like to do it without putting my brain on drugs.
Ms. Hutchins: Okay.
Sheldon: I've seen that commercial with the egg in the frying pan. Very effective.

Mary: Sheldon, I understand why you're upset, but you still owe him an apology.
Sheldon: Then you don't understand.
Mary: Well, for now, it sounds like you two could use a little quiet time.
Sheldon: Fine. I'll switch over to Dr. Linkletter's class. He's a foot taller than Sturgis and can reach more of the chalkboard.

Sheldon: Why are they all singing?
Meemaw: Because it's a musical.
Sheldon: But why can't they just say it?
Meemaw: Well, that wouldn't be very musical, would it?
Sheldon: And where is the music coming from?
Missy: You're thinking about it too much.
Sheldon: And how do they all know the same dance?
Missy: Come on!
Meemaw: Moon pie!

Dr. Willard: The Moho lies between the mantle and the crust, and...
Sheldon: Excuse me, I'm looking for Dr. Linkletter.
Dr. Willard: He's not here.
Sheldon: Sorry for wasting your time. Oh, this is geology. You're already wasting your time.

Keith: How about we work in my dorm tomorrow?
Mary: Um, I don't know if a dormitory is the right environment for someone his age.
Sheldon: If you're worried about the beer-drinking, Dad has thoroughly desensitized me.

Mr. Lundy: Sheldon, if you think you're gonna stop me from selling this house, you're wrong.
Sheldon: Oh, am I?
Mr. Lundy: They tried to stop me from staging The Crucible on roller skates. A lot of understudies went on that day... but so did the show.
Sheldon: You do not want me as an enemy. Or as a friend, sibling or student, I've been told.
Mr. Lundy: All right, look, if it's so important to you, why don't you just go out and find a buyer that you'd be happy with?
Sheldon: So if I find someone I deem acceptable, you'd sell them the house?
Mr. Lundy: If the bank approves, so do I.
Sheldon: Excellent. I wonder if Stephen Hawking would like Texas. It's very flat.

Sheldon: Same room. Different teacher. Same night. Different time. This is a real roller coaster.
Meemaw: Yeah, it's wild.

Sheldon: Where are we going?
Missy: Right there.
Sheldon: An old shack in the middle of the woods? Have you even seen Scooby Doo?
Missy: Great, go home.
Sheldon: At night, by myself? Nice try.

Sheldon: I may be the luckiest boy in East Texas.
Dr. John Sturgis: I know it's Thursday, so dinner will be spaghetti and hot dogs. And, for fun, I have a few episodes of Cosmos recorded.
Sheldon: Forget "maybe." I am the luckiest boy.

George Jr.: "Sell blood or non-vital organs."
George Sr.: Mm, give 'em your brain. You're not using it. [Sheldon laughs] I think that's the only time I've ever heard you laugh.
Sheldon: That's the only time you've ever been funny.

Dr. John Sturgis: So if Einstein's analysis of time is correct, the future's already happened, but we'll discuss that in more detail next week.
Sheldon: Or perhaps we already have.
Dr. John Sturgis: Exactly. [laughs]
Meemaw: Good one.

Adult Sheldon: I was struggling to focus and needed help. Luckily, there was someone on campus I could always count on to lend a friendly ear. A second mom, if you will.
President Hagemeyer: What now?
Sheldon: You said if I ever had a problem, I could come to you and you'd fix it.
President Hagemeyer: When did I say that?
Sheldon: September 13th, 1991. You had just eaten a poppyseed bagel and had one stuck in your teeth.
President Hagemeyer: I'll take your word for it.
Sheldon: It was right here. How did it not make you crazy? It made me crazy.
President Hagemeyer: What do you want?
Sheldon: My family's falling apart.
President Hagemeyer: Oh, I'm sorry to hear that. Uh... what do you want me to do?
Sheldon: Fix it.

Sheldon: Thank you.
Libby: Happy to help.
Sheldon: Is there any chance you'd be available to stand guard at 1:45?
Libby: You have a bathroom schedule?
Sheldon: You don't?

Sheldon: I was shocked to learn that the Happy Hearth Home Bakeries had been bought out by the Domestic Food Corporation, and they started making their bread faster and cheaper.
Anchor: And you don't like that, do you?
Sheldon: No.
Anchor: And you're collecting signatures to make them stop.
Sheldon: I am. Corporations shouldn't be allowed to make these decisions on their own.
Anchor: Well, who should?
Sheldon: The people who eat the bread. This wouldn't happen if there were centralized control over all these big corporations.
Anchor: Are you suggesting a communist form of government in Texas?
Sheldon: I suppose I am.
Meemaw: Hang on a sec-
Anchor: There you have it. Local boy Sheldon Cooper says communism is what Texas needs.
George Sr.: Oh, dear God.

Sheldon: I can't find an umbrella.
Mary: What do you need an umbrella for? It's gonna be hot and sunny.
Sheldon: I think you've answered your own question.

Mary: All right, I'll make a deal with you.
Sheldon: I'm listening.
Mary: You can go to Houston with your friends, but I want to meet this girl first.
Sheldon: That's very reasonable. Thank you.
Mary: You're welcome.
Sheldon: Now, can you please reach the dryer sheets? I get vertigo on the step stool.

Sheldon: There's no telling who could buy that house! What if they have dogs? What if they have birds? What if they have both and the birds learned to bark like dogs?
Mary: Sheldon, you're gettin' yourself all worked up.
Sheldon: For good reason... that house is six feet away from my bedroom window. Who knows what kind of smells could jump the gap? Uh, cigarette smoke, a scented candle, a durian?
Mary: What's a durian?
Sheldon: A vile-smelling fruit of the genus Durio.
Mary: When did you smell that?
Sheldon: I haven't, and I'd like to keep it that way.
Mary: It might be nice. It might be a family with kids your age.
Sheldon: I already live with a kid my age... not a fan!