The quality of any advice anybody has to offer has to be judged against the quality of life they actually lead.

One of the major problems encountered in time travel is not that of accidentally becoming your own father or mother. There is no problem involved in becoming your own father or mother that a broadminded and well-adjusted family can't cope with.

That young girl is one of the least benightedly unintelligent organic life forms it has been my profound lack of pleasure not to be able to avoid meeting.

For seven and a half million years, Deep Thought computed and calculated, and in the end announced that the answer was in fact Forty-two - and so another, even bigger, computer had to be built to find out what the actual question was.

Dirk was, for one of the few times in a life of exuberantly prolific loquacity, wordless.

Put away your worries, the world is a good and perfect place. It is in fact very easy.

One of the things Ford Prefect had always found hardest to understand about humans was their habit of continually stating and repeating the very very obvious.