Assumptions are what we don't know we are making.

Now," said Benjy mouse, "to business." Ford and Zaphod clinked their glasses together. "To business!" they said. "I beg your pardon?" said Benjy. Ford looked round. "Sorry, I thought you were proposing a toast," he said.

Nothing travels faster than the speed of light, with the possible exception of bad news, which obeys its own set of laws.

It can hardly be a coincidence that no language on earth has ever produced the expression, 'As pretty as an airport.'

There is no point in using the word impossible to describe something that has clearly happened.

I love deadlines. I like the whooshing noise they make as they go by.

It is no coincidence that in no known language does the phrase 'As pretty as an airport' appear.

I refuse to answer that question on the grounds that I don't know the answer.

The major difference between a thing that might go wrong and a thing that cannot possibly go wrong is that when a thing that cannot possibly go wrong goes wrong, it usually turns out to be impossible to get at and repair.

First we thought the PC was a calculator. Then we found out how to turn numbers into letters with ASCII — and we thought it was a typewriter. Then we discovered graphics, and we thought it was a television. With the World Wide Web, we've realized it's a brochure.