[Discussing the effects of the Genesis torpedo]
McCoy: Dear Lord. You think we're intelligent enough to... suppose... what if this thing were used where life already exists?
Spock: It would destroy such life in favor of its new matrix.
McCoy: Its "new matrix"? Do you have any idea what you're saying?
Spock: I was not attempting to evaluate its moral implications, Doctor. As a matter of cosmic history, it has always been easier to destroy than to create.
McCoy: Not anymore; now we can do both at the same time! According to myth, the Earth was created in six days. Now, watch out! Here comes Genesis! We'll do it for you in six minutes!
Spock: Really, Dr. McCoy. You must learn to govern your passions; they will be your undoing. Logic suggests...
McCoy: Logic? My God, the man's talking about logic; we're talking about universal Armageddon! You green-blooded, inhuman...