Abraham Lincoln: There's no honorable way to kill, no gentle way to destroy. There is nothing good in war except its ending.
Abraham Lincoln: [interrupting] What a charming negress. Oh, forgive me, my dear. I know that in my time some use that term as a description of property.
Uhura: But why should I object to that term, sir? You see, in our century, we've learned not to fear words.
Yarnek: We offer you an opportunity to become our teachers by demonstrating whether good or evil is more powerful.
Captain James T. Kirk: [grabbing the alien then pulling back his hand at the sound of a sizzle] Oh!
Yarnek: You find my body heat distressing, Captain? You forget the nature of this planet.
Dr. McCoy: What's all this poppycock about life-forms on this planet, Spock? The surface is molten lava, the atmosphere is poisonous...
Scott: President Lincoln, indeed! No doubt to be followed by Louis of France and Robert the Bruce!
Dr. McCoy: If so, we'll execute appropriate honors to each, Mr. Scott.
Dr. McCoy: You're BOTH out of your heads!
Scott: Aye, sir.
Captain James T. Kirk: And you're on the edge of insubordination!
Dr. McCoy: I'd be on the edge of insubordination to remind the captain that this smells of something happening to him that I might not be able to patch back together again.
Abraham Lincoln: Do you drink whiskey?
Captain James T. Kirk: Occasionally. Why?
Abraham Lincoln: Because you have qualities very much like those of another man I admire greatly - General Grant.
Abraham Lincoln: Do I gather that you recognize me?
Captain James T. Kirk: [cautiously] I recognize what you appear to be.
Abraham Lincoln: And appearances can be most deceiving, but not in this case, James Kirk - I AM Abraham Lincoln.
Mr. Spock: [checking the sensors] Fascinating. For a moment it appeared almost... mineral, like living rock with heavy foreclaws. Settling down now to completely human readings.
Scott: We can beam IT aboard anytime now, sir.
Captain James T. Kirk: The very reason for the existence of our starships is contact with other life. Although the method is beyond our comprehension, we have been offered contact; therefore, I shall beam down.
Dr. McCoy: If they're wrong and they DO beam into a pool of lava...?
Scott: Then they're dead men. I couldnae pull them back in time.
Abraham Lincoln: Do you still measure time in minutes?
Captain James T. Kirk: We can convert to it... sir.
Dr. McCoy: Just what was that you locked onto before you beamed him aboard?
Scott: Ya heard Mr. Spock yourself - "mineral" he called it, like living rock.
Dr. McCoy: And that became Lincoln?
Scott: I couldn't tell. May have been another figure down there standing by. What do you make if it?
Dr. McCoy: I'm not quite sure.
Dr. McCoy: You're the science officer. Why aren't you... well, doing whatever a science officer does at a time like this?
Mr. Spock: I am, Doctor. I am observing the alien.
Mr. Spock: There's no doubt they want us down there for some hidden purpose, otherwise they would have revealed some logical reason for all of this.
Captain James T. Kirk: Why Lincoln, Spock? Any speculation on that?
Mr. Spock: Speculation is unnecessary, Captain. The answer is clear. President Lincoln has always been a very personal hero to you. What better way to titillate your curiosity than to make him come alive for you.
Mr. Spock: As I turned and my eyes beheld you, I displayed emotion. I beg forgiveness.
Scott: It's a confrontation of some sort. Those are all figures out of history, notoriously evil.
Captain James T. Kirk: Where do you come from?
Col. Green: I can't remember. Isn't that strange? My memory used to be quite remarkable. Well, wherever it was, I want to get back.
Abraham Lincoln: For an illusion, my opponent carried a considerable punch. Oh, I forgot. You consider ME an illusion, too.