2001: A Space Odyssey

"Except for a single very powerful radio emission aimed at Jupiter the four-million year old black monolith has remained completely inert. Its origin and purpose are still a total mystery."

"Eighteen months ago the first evidence of intelligent life off the Earth was discovered."

Dave: "HAL, I won't argue with you anymore! Open the doors!"
HAL: "Dave, this conversation can serve no purpose anymore. Goodbye."

"I'm afraid. I'm afraid, Dave. Dave, my mind is going. I can feel it."

Dave: "Hello, HAL. Do you read me, HAL?"
HAL: "Affirmative, Dave. I read you."
Dave: "Open the pod bay doors, HAL."
HAL: "I'm sorry, Dave. I'm afraid I can't do that."
Dave: "What's the problem?"
HAL: "I think you know what the problem is just as well as I do."
Dave: "What are you talking about, HAL?"
HAL: "This mission is too important for me to allow you to jeopardize it."
Dave: "I don't know what you're talking about, HAL."
HAL: "I know that you and Frank were planning to disconnect me, and I'm afraid that's something I cannot allow to happen."

"I am putting myself to the fullest possible use, which is all I think that any conscious entity can ever hope to do."

"Look Dave, I can see you're really upset about this. I honestly think you ought to sit down calmly, take a stress pill, and think things over."

"Just what do you think you're doing, Dave?"