Dr. McCoy : Now, you listen to me, you pointed-eared Vulcan...
Mr. Spock : [grabbing McCoy] I don't like that. I don't think I ever did, and now I'm sure!
Dr. McCoy : What's happening to you, Spock!
Mr. Spock : Nothing that shouldn't have happened long ago.
Dr. McCoy : Long ago... Of course. Long ago!
Mr. Spock : In this severe cold, we cannot survive much longer.
Dr. McCoy : Leave me here, Spock!
Mr. Spock : We go together or not at all.
Dr. McCoy : Don't be a fool! My hands and face are frostbitten. I can't feel my feet. Alone you have a chance. Now do what I say. Go try to find Jim.
Mr. Spock : We go together.
Dr. McCoy : You stubborn, thick-headed Vulcan!
Dr. McCoy : You've been dishonest with me, Spock, and that is also something new for you.
Dr. McCoy : Are you trying to kill me, Spock? Is that what you really want? Think; what are you feeling? Rage, jealousy? Have you ever had those feelings before?
Mr. Spock : This is impossible... Impossible. I am a Vulcan.
Dr. McCoy : The Vulcan you knew won't exist for another five thousand years. Think, man. What's happening on your planet right now, this very moment?
Mr. Spock : My ancestors are barbarians. Warlike barbarians.
Dr. McCoy : Who nearly killed themselves off with their own passions. Spock, you're reverting into your own ancestors five thousand years before you were born!
Dr. McCoy : Zarabeth, you are a beautiful cook. Have you ever been told that?
Zarabeth : Not recently.
Dr. McCoy : Oh, well, you'll find that Spock is quite delinquent in those matters.
Zarabeth : I hadn't noticed it.
Dr. McCoy : Oh? Well, now that I'm feeling better, you'll notice a distinct difference in our approach.