Sheldon: Like a milking stool, my case rests on three legs. I will demonstrate that I was improperly instructed in driving by a woman whose lack of respect for society borders on the sociopathic. I will argue that the emergency met the legal doctrine of quod est necessarium est licitum, that which is necessary is legal. But first, I will raise a Sixth Amendment issue. I'm unable to confront my accuser, a non-human entity, to wit, a camera. So, to sum up, improper instruction, quod est necessarium est licitum, Sixth Amendment. My milk stool is complete.

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.

Sheldon: Good Morning your honor, Dr. Sheldon Cooper appearing in pro se - that is to say representing himself.
Judge: I know what it means, I went to law school.
Sheldon: Yet you wound up in traffic court.

Sheldon: *After just being jailed, at the biggest guy in the cell who's sitting on a bench* That's my spot.

Sheldon: That's the toilet?
Policeman: Well, it ain't a wishin' well!
Sheldon: Please tell the judge I'm ready to apologize.