Penny: God, you know, I have been in L.A. for almost two years now, and I haven't got a single acting job. I have accomplished nothing, haven't gotten a raise at work, haven't even had sex in six months, and just now when I was walking up those stairs a fly flew in my mouth and I ate it.
Sheldon: Well, actually, insects are a dietary staple in many cultures. They're almost pure protein.

Raj: I don't like bugs, okay. They freak me out.
Sheldon: Interesting. You're afraid of insects and women. Ladybugs must render you catatonic.

Sheldon: Scissors cuts paper, paper covers rock, rock crushes lizard, lizard poisons Spock, Spock smashes scissors, scissors decapitates lizard, lizard eats paper, paper disproves Spock, Spock vaporizes rock, and as it always has, rock crushes scissors.

Sheldon: Why are you crying?
Penny: Because I'm stupid.
Sheldon: That's no reason to cry. One cries because one is sad. For example, I cry because others are stupid, and that makes me sad.

Raj: What's with him?
Leonard: Penny is keeping him up at night.
Howard: Me too. But probably in a different way.

Sheldon: Level 3 and she thinks she's rich. What a noob!

Leslie: Hello men. Sheldon.