Quote by HAL 9000
"I understand you perfectly. You want me to be myself. I'm afraid that's impossible."
More from HAL 9000
"The 9000 series has a perfect operational record. We are all, by any practical definition of the words, foolproof and incapable of error."
"I'm afraid I can't do that, Dave."
"This mission is too important for me to allow you to jeopardize it."
"I am completely operational and all my circuits are functioning perfectly."