What appear to be the most valuable aspects of the theoretical physics we have are the mathematical descriptions which enable us to predict events. These equations are, we would argue, the only realities we can be certain of in physics; any other ways we have of thinking about the situation are visual aids or mnemonics which make it easier for beings with our sort of macroscopic experience to use and remember the equations.

In an autocracy, one person has his way; in an aristocracy, a few people have their way; in a democracy, no one has his way.

The way to do research is to attack the facts at the point of greatest astonishment.

People have been marrying and bringing up children for centuries now. Nothing has ever come of it.

One of the greatest superstitions of our time is the belief that it has none.

It is inconceivable that anything should be existing. It is not inconceivable that a lot of people should also be existing who are not interested in the fact that they exist. But it is certainly very odd.

A narrow mind and a wide mouth usually go together.