To Trin Tragula's horror, the shock completely annihilated her brain; but to his satisfaction he realized that he had proved conclusively that if life is going to exist in a Universe of this size, then the one thing it cannot afford to have is a sense of proportion.

Simple. I got very bored and depressed, so I went and plugged myself in to its external computer feed. I talked to the computer at great length and explained my view of the Universe to it," said Marvin. "And what happened?" pressed Ford. "It committed suicide," said Marvin and stalked off back to the Heart of Gold.

If on the other hand he went to pay his respects to The Door and it wasn't there . . . what then? The answer, of course, was very simple. He had a whole board of circuits for dealing with exactly this problem, in fact this was the very heart of his function. He would continue to believe in it whatever the facts turned out to be, what else was the meaning of Belief? The Door would still be there, even if the Door was not.

My absolute favourite piece of information is the fact that young sloths are so inept that they frequently grab their own arms and legs instead of tree limbs, and fall out of trees.

I seldom end up where I wanted to go, but almost always end up where I need to be.

I don't like the idea of missionaries. In fact, the whole business fills me with fear and alarm. I don't believe in God, or at least not in the one we've invented for ourselves in England to fulfill our peculiarly English needs, and certainly not in the ones they've invented in America who supply their servants with toupees, television stations and, most importantly, toll-free telephone numbers. I wish that people who did believe in such things would keep them to themselves and not export them to the developing world.

He attacked everything in life with a mix of extraordinary genius and naive incompetence, and it was often difficult to tell which was which.