Bailey: It's blocking the way!
Spock: Quite unnecessary to raise your voice, Mr. Bailey.
Kirk: You could see the alarm lights from there McCoy. Why didn't you tell me?
McCoy: Finally finished a physical on you, didn't I. What am l, a doctor or a moon shuttle conductor? (after Kirk leaves) If I jumped every time a light came on around here, I'd end up talking to myself.
Bailey: Raising my voice back there doesn't mean I was scared or couldn't do my job, it means I happen to have a human thing called an adrenaline gland.
Spock: It does sound most inconvenient, however. Have you considered having it removed?
Bailey: Very funny.
Sulu: You try to cross brains with Spock, he'll cut you to pieces every time.
Bailey: I vote we blast it!
Kirk: I'll keep that in mind, Mr. Bailey... when this becomes a democracy.
Spock: Has it occurred to you that there's a certain... inefficiency in constantly questioning me on things you've already made up your mind about?
Kirk: It gives me emotional security.
Kirk: Aren't you the one who said a little suffering is good for the soul?
McCoy: I never say that!
Kirk: Dr. McCoy, I've heard you say that Man is ultimately superior to any mechanical device.
McCoy: No, I never say that, either.
Kirk: I could've sworn I heard you say that.
Kirk: What the devil is this? Green leaves?
Rand: It's dietary salad, sir. Dr. McCoy changed your diet card. I thought you knew.
McCoy: Your weight was up a couple of pounds. Remember?
Kirk: Will you stop hovering over me, Yeoman?
Rand: I'll change it if you don't like it.
Kirk: Bring some for the doctor, too.
McCoy: No, no. I never eat until the crew eats.
Kirk: If I get my hands on the headquarters genius that assigned me a female yeoman...
McCoy: What's the matter, Jim, don't you trust yourself?
Kirk: I've already got a female to worry about. Her name is Enterprise.
Kirk: You know the greatest danger facing us is ourselves, and irrational fear of the unknown. There is no such thing as the unknown. Only things temporarily hidden, temporarily not understood.
Sulu: 4 minutes, 30 seconds.
Scotty: You have an annoying fascination for timepieces, Mr. Sulu.
Kirk: This is the Captain of the Enterprise. Our respect for other life forms requires that we give you this... warning. There is one critical item of information that has never been incorporated into the memory banks of any Earth ship. Since the early years of space exploration, Earth vessels have had incorporated into them a substance known as... corbomite. It is a material and a device which prevents attack on us. If any destructive energy touches our vessel, a reverse reaction of equal strength is created, destroying...
Balok: You now have two minutes.
Kirk: ...destroying the attacker. It may interest you to know that since the initial use of corbomite more than two of our centuries ago, no attacking vessel has survived the attempt. Death has... little meaning to us. If it has none to you then attack us now. We grow annoyed at your foolishness.
Spock: I regret not having learned more about this Balok. He was reminiscent of my father.
Scotty: May heaven have helped your mother.
Spock: Quite the contrary. She considered herself a very fortunate Earth woman.
McCoy: What about your crew?
Balok: (laughing hysterically) I have no crew, Doctor. I run everything... this entire complex, from this small ship.
Balok: You represent Earth's best, then?
Bailey: No, sir, I'm not. I'll make plenty of mistakes.
Kirk: But you'd find out more about us that way, and I'd get a better officer in return.
Balok: I see. We think much alike, Captain, you and l.