This must be Thursday,' said Arthur to himself, sinking low... - Douglas Adams, The Hitchhiker's Guide to the Galaxy

"I think you ought to know I'm feeling very depressed."

"The ships hung in the sky in much the same way that bricks don't."

"Exactly!"said Deep Thought. "So once you do know what the question actually is, you'll know what the answer means."

"What's up?"[asked Ford.]I don't know,"said Marvin, "I've never been there."

"For instance, on the planet Earth, man had always assumed that he was more intelligent than dolphins because he had achieved so much—the wheel, New York, wars and so on—whilst all the dolphins had ever done was muck about in the water having a good time. But conversely, the dolphins had always believed that they were far more intelligent than man—for precisely the same reasons."