"I refuse to answer that question on the grounds that I don't know the answer."
I love deadlines. I like the whooshing sound they make as they go by.
In the beginning the Universe was created. This has made a lot of people very angry and has been widely regarded as a bad move.
Marvin: "I am at a rough estimate thirty billion times more intelligent than you. Let me give you an example. Think of a number, any number."
Zem: "Er, five."
Marvin: "Wrong. You see?"
"Time is an illusion. Lunchtime doubly so."
"You know," said Arthur, "it's at times like this, when I'm trapped in a Vogon airlock with a man from Betelgeuse, and about to die of asphyxiation in deep space that I really wish I'd listened to what my mother told me when I was young."
[Ford Prefect:] "Why, what did she tell you?"
[Arthur:] "I don't know, I didn't listen."
"My capacity for happiness," he added, "you could fit into a matchbox without taking out the matches first"
[The World Wide Web is] the only thing I know of whose shortened form — www — takes three times longer to say than what it's short for.
The impossible often has a kind of integrity to it which the merely improbable lacks.
"What's up?" [asked Ford.]
"I don't know," said Marvin, "I've never been there."
For Children: You will need to know the difference between Friday and a fried egg. It's quite a simple difference, but an important one. Friday comes at the end of the week, whereas a fried egg comes out of a chicken. Like most things, of course, it isn't quite that simple. The fried egg isn't properly a fried egg until it's been put in a frying pan and fried. This is something you wouldn't do to a Friday, of course, though you might do it on a Friday. You can also fry eggs on a Thursday, if you like, or on a cooker. It's all rather complicated, but it makes a kind of sense if you think about it for a while.
"Listen, three eyes,", he said, "don't you try to outweird me, I get stranger things than you free with my breakfast cereal."
"Six pints of bitter," said Ford Prefect to the barman of the Horse and Groom. "And quickly please, the world's about to end."
"I've seen it. It's rubbish." About a Magrathean sunset that Arthur finds magnificent.
A learning experience is one of those things that says, 'You know that thing you just did? Don't do that.'
The door was the way to... to... The Door was The Way. Good. Capital letters were always the best way of dealing with things you didn't have a good answer to.
On being left in a parking lot for 500 million years: "The first ten million years were the worst. And the second ten million years, they were the worst too. The third ten million years I didn't enjoy at all. After that I went into sort of a decline"