Whenever I'm out-of-doors and find myself wanting to have a first-rate think, I fling myself down on my back, throw my arms and legs out so that I look like an asterisk, and gaze at the sky.

As I stood outside in Cow Lane, it occurred to me that Heaven must be a place where the library is open twenty-four hours a day, seven days a week. No ... eight days a week.

I had long ago discovered that when a word or formula refused to come to mind the best thing for it was to think of something else: tigers for instance or oatmeal. Then when the fugitive word was least expecting it I would suddenly turn the full blaze of my attention back onto it catching the culprit in the beam of my mental torch before it could sneak off again into the darkness.

What intrigued me more than anything else was finding out the way in which everything, all of creation - all of it! - was held together by invisible chemical bonds, and I found a strange, inexplicable comfort in knowing that somewhere, even though we couldn't see it in our own world, there was a real stability.

I am often thought of as being remarkably bright, and yet my brains, more often than not, are busily devising new and interesting ways of bringing my enemies to sudden, gagging, writhing, agonizing death.

I was learning that among friends, a smile can be better than a belly laugh.

If poisons were ponies, I'd put my money on cyanide.