One of the extraordinary things about life is the sort of places it's prepared to put up with living.

This planet has -- or rather had -- a problem, which was this: most of the people living on it were unhappy for pretty much of the time. Many solutions were suggested for this problem, but most of these were largely concerned with the movements of small green pieces of paper, which is odd because on the whole it wasn't the small green pieces of paper that were unhappy.

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 the same kind. Neither can it replace what you see and what you know, because that would be to replace you yourself.

The Answer to the Great Question Of . . . Life, the Universe and Everything . . . [is] Forty-two.

A learning experience is one of those things that says, 'You know that thing you just did? Don't do that.

That young girl is one of the least benightedly unintelligent organic life forms it has been my profound lack of pleasure not to be able to avoid meeting.