What's the orbital velocity of the moon?

Writing, for me, is a little like wood carving. You find the lump of tree (the big central theme that gets you started), and you start cutting the shape that you think you want it to be. But you find, if you do it right, that the wood has a grain of its own (characters develop and present new insights, concentrated thinking about the story opens new avenues). If you're sensible, you work with the grain and, if you come across a knot hole, you incorporate that into the design. This is not the same as 'making it up as you go along'; it's a very careful process of control.

Every procedure for getting a cat to take a pill works fine - once. Like the Borg, they learn.

I read the best works of some of the best satirists, and indeed best writers from the beginning of the Victorian era to about the 1960s. If you want to be a blacksmith, you go and watch the blacksmith working, and you work out what the blacksmith does.

Albert grunted. "Do you know what happens to lads who ask too many questions?" Mort thought for a moment. "No," he said eventually, "what?" There was silence. Then Albert straightened up and said, "Damned if I know. Probably they get answers, and serve 'em right.

I could be wrong. Not being certain is what being a philosopher is all about.

Who'd want a pony when you could have the whole universe? It was far more interesting and you didn't have to muck it out once a week.