"Space is big. You just won't believe how vastly, hugely, mind-bogglingly big it is. I mean, you may think it's a long way down the road to the chemist's, but that's just peanuts to space."
"Curiously enough, the only thing that went through the mind of the bowl of petunias as it fell was Oh no, not again. Many people have speculated that if we knew exactly why the bowl of petunias had thought that we would know a lot more about the nature of the Universe than we do now."
"Would it save you a lot of time if I just gave up and went mad now?"
"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 movement of small green pieces of paper, which was odd because on the whole it wasn't the small green pieces of paper that were unhappy."
"Don't Panic."
"Arthur: If I asked you where the hell we were, would I regret it?Ford: We're safe.Arthur: Oh good.Ford: We're in a small galley cabin in one of the spaceships of the Vogon Constructor Fleet.Arthur: Ah, this is obviously some strange use of the word safe that I wasn't previously aware of."