The difference between us and a computer is that, the computer is blindingly stupid, but it is capable of being stupid many, many million times a second.

I wrote an ad for Apple Computer: "Macintosh - We might not get everything right, but at least we knew the century was going to end".

Zaphod felt he was teetering on the edge of madness and wondered if he shouldn't just jump over and have done with it.

Anything that thinks logically can be fooled by something else that thinks at least as logically as it does.

So long, and thanks for all the fish.

Arthur felt happy. He was terribly pleased that the day was for once working out so much according to plan. Only twenty minutes ago he had decided he would go mad, and now here he was already chasing a Chesterfield sofa across the fields of prehistoric Earth.

Many men of course became extremely rich, but this was perfectly natural and nothing to be ashamed of because no one was really poor, at least no one worth speaking of.