"I think we have different value systems." "Well, mine's better."

Earthmen are not proud of their ancestors and never invite them round to dinner.

Mark Carwardine's role, essentially, was to be the one who knew what he was talking about. My role, and one for which I was entirely qualified, was to be an extremely ignorant non-zoologist to whom everything that happened would come as a complete surprise.

Your God person puts an apple tree in the middle of a garden and says, do what you like, guys, oh, but don't eat the apple. Surprise surprise, they eat it and he leaps out from behind a bush shouting "Gotcha". It wouldn't have made any difference if they hadn't eaten it.' 'Why not?' 'Because if you're dealing with somebody who has the sort of mentality which likes leaving hats on the pavement with bricks under them you know perfectly well they won't give up. They'll get you in the end.

Marvin was humming ironically because he hated humans so much.

There are two things in particular that it [the computer industry] failed to foresee: one was the coming of the Internet(...); the other was the fact that the century would end.

When the girl sitting at the next table looked away from a moment, Dirk leaned over and took her coffee. He knew that he was perfectly safe doing this because she would simply not be able to believe that this had happened.