Mr. Bailey: Raising my voice back there doesn't mean I was too scared or unable to do my job. It means I happen to have a human thing called an adrenaline gland.
Spock: It sounds most inconvenient, however. Have you thought of having it removed?
Kirk: You are not going to admit that for the first time in your life you committed a purely human, emotional act?
Spock: No, sir.
Kirk: You are a stubborn man, Mr. Spock.
Spock: ::considers it for a moment:: Yes, sir.
Spock: You are a sensualist, Doctor.
McCoy: You bet your pointed ears I am!
McCoy: Your pulse is 242, Your blood pressure is practically nonexistant - if you call that green stuff in your veins blood.
Spock: The readings are perfectly normal for me, thank you, Doctor. And as for my anatomy being different from yours, I am delighted.
Kirk: You're starting to sound like Spock.
McCoy: If you're gonna get nasty I'm gonna leave.
Kirk: You were actually enjoying my predicament back there. At times you seem almost human.
Spock: Captain, I hardly think that insults are within your perrogative as my commanding officer.
Kirk: Sorry.
These are just a few. I'll come up with some more later.