| Quote |
| McCoy : | "There's something wrong about a man who never smiles, whose conversation never varies from the routine of the job, and who won't talk about his background." |
| Spock : | "I see." |
| McCoy : | "Spock, I mean that it's odd for a non-Vulcan. The ears make all the difference." |
| Spock : | "I find your argument strewn with gaping defects in logic." |
| McCoy : | "Maybe, but you can't evaluate a man by logic alone. Besides, he has avoided two appointments that I've made for his physical exam without reason." |
| Spock : | "That's not at all surprising, Doctor. He's probably terrified of your beads and rattles." |
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| Mudd : | "Spock, you're going to love it here. They all talk just the way you do." | | to Spock |
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| Mudd : | "She urged me on into outer space. Not that she meant to, but with her continual, eternal, confounded nagging... Well, I think of her constantly. And every time I do, I go further out into space." | | to Kirk; regarding his wife |
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| Kirk : | "What is man but that lofty spirit, that sense of ... enterprise. That devotion to something that cannot be sensed, cannot be realized, but only dreamed. The highest reality" |
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| Harry : | "Human beings do not survive on bread alone, you poor, soulless creature, but on the nourishments of liberty. For what indeed is a man without freedom, naught but a mechanism, trapped in the cogwheels of eternity." | | to Norman |
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| Spock : | "Logic is a little tweeting bird chirping in a meadow. Logic is a wreath of pretty flowers which smell bad. Are you sure your circuits are registering correctly? Your ears are green." | | on logic |
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