Spock: The most unfortunate lack in current computer programming is that there is nothing available to immediately replace the starship surgeon.
Kirk: There are certain things men must do to remain men. Your computer would take that away.
Dr. Richard Daystrom: There are other things a man like you might do. Or perhaps you object to the possible loss of prestige and ceremony accorded a starship captain. A computer can do your job and without all that.
Kirk: You'll have to prove that to me, Doctor.
Dr. Richard Daystrom: That is what we're here for, isn't it, Captain?
McCoy: Did you see the love light in Spock's eyes? The right computer finally came along.
Kirk: Am I afraid of losing command to a computer? Daystrom's right. I can do other things. Am I afraid of losing the prestige and power that goes with being a starship captain? Is that why I'm fighting it? Am I that petty?
McCoy: If you have the awareness to ask yourself that question, you don't need me to answer it for you. Why don't you ask James T. Kirk? He's a pretty honest guy.
Kirk: Machine over man, Spock? It was impressive. It might even be practical.
Spock: Practical, Captain? Perhaps... but not desirable. Computers make excellent and efficient servants, but I have no wish to serve under them. Captain, a starship also runs on loyalty to one man. And nothing can replace it or him.
Kirk: I'm not interested in eating, Bones.
McCoy: This isn't chicken soup. I may be just a ship's doctor, but I make a Finagle's Folly that's known from here to Orion. I strongly prescribe it, Jim.
Kirk: Do you know the one, "All I ask is a tall ship" ?
McCoy: It's a line from a poem. A very old poem, isn't it?
Kirk: 20th century Earth. "All I ask is a tall ship and a star to steer it by." You could feel the wind at your back in those days. The sounds of the sea beneath you. Even if you take away the wind and the water, it's still the same. The ship is yours. You can feel her. And the stars are still there, Bones.
Dr. Richard Daystrom: It wasn't a deliberate act. M-5's analysis told it it needed a new power source. The ensign simply got in the way.
Kirk: How long before all of us simply get in the way?
McCoy: Please, Spock, do me a favor and don't say it's fascinating.
Spock: No. But it is... interesting.
McCoy: That thing is a danger to us all. Now find some way to shut it off.
Dr. Richard Daystrom: You can't understand. You're frightened because you can't understand it. I'm going to show you. I'm going to show all of you. It takes 430 people to man a starship. With this, you don't need anyone. One machine can do all those things they send men out to do now. Men no longer need die in space or on some alien world. Men can live and go on to achieve greater things than fact-finding and dying for galactic space, which is neither ours to give or to take. You can't understand. We don't want to destroy life. We want to save it.
Dr. Richard Daystrom: Nothing can hurt you. I gave you that. You are great. I am great. 20 years of groping to prove the things I'd done before were not accidents. Seminars and lectures to rows of fools who couldn't begin to understand my systems. Colleagues... colleagues laughing behind my back at the boy wonder and becoming famous, building on my work. Building on my work.
Spock: Commodore Wesley is a dedicated commander. I should regret serving aboard the instrument of his death.
McCoy: Compassion. That's the one thing no machine ever had. Maybe it's the one thing that keeps men ahead of them. Care to debate that, Spock?
Spock: No, Doctor. I simply maintain that computers are more efficient than human beings, not better.
McCoy: But tell me, which do you prefer to have around?
Spock: I presume your question is meant to offer me a choice between machines and human beings, and I believe I have already answered that question.
McCoy: I was just trying to make conversation, Spock.
Spock: It would be most interesting to impress your memory engrams on a computer, Doctor. The resulting torrential flood of illogic would be most entertaining.