| Quote | 
| | Spock : | "I've noticed that about your people. You find it easier to understand the death of one than the death of a million. You speak about the objective hardness of the Vulcan heart, yet how little room there seems to be in yours." |  |  | to McCoy | 
 | 
| | Kirk : | "We're on a difficult mission, but it's not the first time. Our orders do not say 'stay alive' or 'retreat'. Our mission is to investigate." |  |  | to crew | 
 | 
| | McCoy : | "Here we are. Antibodies of our own galaxy, attacking an invading germ. It would be ironic indeed if that were our sole destiny, wouldn't it?" |  |  | to Kirk | 
 | 
| | McCoy : | "Shut up, Spock! We're rescuing you!" |  |  | to Spock | 
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