In history as it comes to be written, there is usually some Spirit of the Age which historians can define, but the shape of things is seldom so clear to those who live them. To most thoughtful men it has generally seemed that theirs was an Age of Confusion.

Man is the only one in whom the instinct of life falters long enough to enable it to ask the question "Why?

Anxiety and distress, interrupted occasionally by pleasure, is the normal course of man's existence.

When, in the present world, men behave well, that is no doubt sometimes because they are creatures of habit as well as, sometimes, because they are reasonable.

We have not merely escaped from something but into something... We have joined the greatest of all communities, which is not that of man alone but of everything which shares with us the great adventure of being alive.

In a cat's eye, all things belong to cats.

Metaphysics may be, after all, only the art of being sure of something that is not so and logic only the art of going wrong with confidence.