Stuart: A little tip. Uh, stick with the smiles you know.

Stuart: Oh, Sheldon, I'm afraid you couldn't be more wrong.
Sheldon: More wrong? Wrong is an absolute state and not subject to gradation.
Stuart: Of course it is. It's a little wrong to say a tomato is a vegetable, it's very wrong to say it's a suspension bridge.

Howard: Hang on, I know a place where you could you stay and earn some money at the same time.
Stuart: Great!
Howard: I just have to warn you: it will involve humiliation, degradation and verbal abuse.
Stuart: So, what's the catch?

Bernadette: Hey, Stuart.
Stuart: *startled* Hey.
Bernadette: Sorry, did I startle you?
Stuart: Yes, but at this point pretty much any customer does.

Amy: Sheldon, I have an advanced degree in the study of the human brain, so if my fiancé is a raving lunatic, it's kind of a ding on my reputation.
Sheldon: If leaders just stepped aside every time they didn't have the consent of the governed, what would we have?
Amy: Democracy.
Sheldon: Not on my watch.

Amy: Sheldon, it's the American way, the peaceful transfer of power.
Sheldon: I don't know.
Leonard: Think about Ant-Man.
Sheldon: I'm always thinking about Ant-Man.
Leonard: Michael Douglas had the suit and then he passed it on to Paul Rudd.
Sheldon: Maybe you're right.
Amy: Really? The Ant-Man thing? That's what won you over?
Sheldon: Yes. He got the details right. That's how you use a superhero.

Sheldon: Instead of being in charge, I can be the vocal opposition, criticizing and badgering the president at every turn.
Amy: I think you'll be really good at that.
Sheldon: Me, too.
Leonard: I think I made a huge mistake.
Penny: Me, too.