Sheldon: I admire you, Leonard.
Leonard: Really, why?
Sheldon: You're happy with who you are. You don't get jealous of other people. Instead of being weighed down by ambition, you just float along like a dead body in a river.
Leonard: I couldn't just take the compliment. I had to ask why.

Leonard: It's fine, I've been driving him for years. What's one more day?
Sheldon: Oh, and I've got a new car game we can play. It's called "What siren am I?"

Penny: So you and Leonard-
Sheldon: Oh dear God.
Penny: Little misunderstanding, huh?
Sheldon: A little misunder- Galileo and the Pope had a little misunderstanding.

Sheldon: Wow! You look beautiful.
Amy: Really? 'Cause I was gonna return it.
Sheldon: Why would you return it? You look like a pile of swans.

Leonard: What's this?
Sheldon: Tea. it's costumary to serve hot beverages when one is in emotional distress. [pats Leonard's head] There there. You want to talk about it?
Leonard: No.
Sheldon: Thank godness. 'There there' was really all I had.

Sheldon: What kind of sick?
Penny: Oh, the flu, I guess.
Sheldon: I don't need you to guess, I need you to know. Now, when did the symptoms first appear?
Penny: Maybe Friday!
Sheldon: Friday! Was that morning or afternoon?
Penny: I don't--
Sheldon: Think, woman! Who blew their nose and when?

Sheldon: I was otherwise engaged.
Penny: Doing what?
Sheldon: I was examining perturbutive amplitudes in N=4 supersymeteric theories leading to a re-examination of the ultraviolet properties of multiloop N=8 supergravity using modern twistor theory.

Leonard: Didn't I tell you I'd be working nights and you'd have to make others arrangements?
Sheldon: You did.
Leonard: And?
Sheldon: I didn't.

Sheldon: You're my girlfriend and you're not going to cater to my every need? Where'd the magic go?

Raj: They're going to digitally add a supernova they say its the perfect metaphor for my incandescent talent.
Sheldon: Yes, a giant ball of gas that collapses on itself.

Sheldon: Eugh, English pudding. You get yourself all excited for pudding and here comes a cake with raisins in it.

Sheldon: I just don't want to be yet another flip-flop fatality.

Sheldon: Oh God, not Euclid Avenue!

Sheldon: It's illegal to spay a human being.

Sheldon: I agreed to speak to you this evening because I was told that you're the best and the brightest of this university's doctoral candidates. Hmm. Of course, that's like saying you are the most important electron in a hydrogen atom. 'Cause you see, there's only one electron in a hydrogen atom. Best and brightest my sweet patootee. All right, let's begin. Show of hands, who here is familiar with the concept of topological insulators? Don't kid yourselves.