Dr. Linkletter: So then we're able to take the ends of the strings and connect them to a ten-dimensional membrane. Yes, Sheldon.
Sheldon: Dr. Sturgis taught us that if you leave the strings open, it allows far more possibilities.
Dr. Linkletter: We don't believe you need open strings anymore. That's an older model of thinking. Now... Yes, Sheldon.
Sheldon: Just because something is older doesn't mean that it's not still good. Original Star Trek is older than Next Generation, but if you think that Mr. Data is better than Mr. Spock, you don't know what you're talking about.
Dr. Linkletter: I don't know what you're talking about.

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.

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.

Mary: Sheldon, faith means believing in something you can't know for sure is real. And right now, I am struggling with that.
Sheldon: So you don't believe in God anymore?
Mary: That isn't something for you to worry about. I need to figure this out myself.
Sheldon: Can I help? Maybe I could provide a fresh perspective.
Mary: I don't think so, baby.
Sheldon: Did you know that if gravity were slightly more powerful, the universe would collapse into a ball?
Mary: I did not.
Sheldon: Also, if gravity were slightly less powerful, the universe would fly apart and there would be no stars or planets.
Mary: Where you going with this, Sheldon?
Sheldon: It's just that gravity is precisely as strong as it needs to be. And if the ratio of the electromagnetic force to the strong force wasn't one percent, life wouldn't exist. What are the odds that would happen all by itself?
Mary: Why are you trying to convince me to believe in God? You don't believe in God.
Sheldon: I don't, but the precision of the universe at least makes it logical to conclude there's a creator.
Mary: Baby, I appreciate what you're trying to do, but logic is here. And my problem is here.
Sheldon: Well, there are 5 billion people on this planet and you're the perfect mom for me. What are the odds of that?

George Sr.: Hey, Hubert. Was Sheldon in class today?
Mr. Givens: Nope. Haven't seen him all week.
George Sr.: Weren't you gonna say anything?
Mr. Givens: I didn't want to jinx it.

George Sr.: So he hasn't been in any of your classes?
Ms. Ingram: Mm-mm, not a one.
Ms. MacElroy: Nope.
George Sr.: But I bring him here, I take him home he's got to be somewhere in the building.
Ms. Ingram: Mm, I might've seen him in the library. But at this point, I sometimes think I see him when I'm alone in my house.
Ms. MacElroy: Like that creepy Chucky doll in the movies?
Ms. Ingram: [laughs] Exactly!

[Sheldon is chuckling as he stares at a blank screen]
Missy: What are you doing?
Sheldon: Watching last week's Professor Proton in my mind.