Hitchhikers Guide To The Galaxy Quotes by Douglas Adams, Terry Pratchett and many others.

Space is big. Really 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, but that’s just peanuts to space.
The storm had now definitely abated, and what thunder there was now grumbled over more distant hills, like a man saying ‘And another thing…’ twenty minutes after admitting he’d lost the argument.
Earthmen are not proud of their ancestors and never invite them round to dinner.
I don’t want to die now!” he yelled. “I’ve still got a headache! I don’t want to go to heaven with a headache, I’d be all cross and wouldn’t enjoy it!
Shee, you guys are so unhip it’s a wonder your bums don’t fall off.
Protect me from knowing what I don’t need to know. Protect me from even knowing that there are things to know that I don’t know. Protect me from knowing that I decided not to know about the things that I decided not to know about. Amen. […] Lord, lord, lord. Protect me from the consequences of the above prayer.
Perhaps I’m old and tired, but I always think that the chances of finding out what really is going on are so absurdly remote that the only thing to do is to say hang the sense of it and just keep yourself occupied.
Pardon me for breathing, which I never do any way so I don’t know why I bother to say it, oh God, I’m so depressed.
So, the world is fine. We don’t have to save the world—the world is big enough to look after itself. What we have to be concerned about, is whether or not the world we live in, will be capable of sustaining us in it. That’s what we need to think about.
It seemed to me,’ said Wonko the Sane, ‘that any civilization that had so far lost its head as to need to include a set of detailed instructions for use in a package of toothpicks, was no longer a civilization in which I could live and stay sane.
This must be Thursday. I never could get the hang of Thursdays.
“What’s up?” “I don’t know,” said Marvin, “I’ve never been there.”
How many roads must a man walk down?
“What’s so unpleasant about being drunk?” “Ask a glass of water.”
They wouldn’t even lift a finger to save their own grandmothers from the Ravenous Bugblatter Beast of Traal without orders signed in triplicate, sent in, sent back, queried, lost, found, subjected to public inquiry, lost again, and finally buried in soft peat for three months and recycled as firelighters.
Would you like me to go and stick my head in a bucket of water?
I think when people mean that Discworld books have become darker they really mean the series is growing up. In ‘The Colour of Magic’ most of the city is set alight. It’s a joke, in much the same way that the Earth is destroyed almost at the start of Douglas Adams’s ‘The Hitchhikers Guide to the Galaxy.’