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

In an infinite Universe anything can happen.

How do you know you're having fun if there's no one watching you have it?

It can hardly be a coincidence that no language on earth has ever produced the expression, 'As pretty as an airport.

This planet has — or rather had — a problem, which was this: most of the people living on it were unhappy for pretty much all of the time.

You cannot see what I see because you see what you see. You cannot know what I know because you know what you know. What I see and what I know cannot be added to what you see and what you know because they are not of the same kind. Neither can it replace what you see and what you know, because that would be to replace you yourself." "Hang on, can I write this down?" said Arthur, excitedly fumbling in his pocket for a pencil.

He had a tremendous propensity for getting lost when driving. This was largely because of his method of “Zen” navigation, which was simply to find any car that looked as if it knew where it was going and follow it. The results were more often surprising than successful, but he felt it was worth it for the sake of the few occasions when it was both.