The typical American believes that no necessity of the soul is free and that there are precious few, if any, which cannot be bought.

Logic is the art of going wrong with confidence.

We need some contact with the things we sprang from. We need nature at least as a part of the context of our lives. Without cities we cannot be civilized. Without nature, without wilderness even, we are compelled to renounce an important part of our heritage.

The most important part of our lives-our sensations, emotions, desires, and aspirations-takes place in a universe of illusions which science can attenuate or destroy, but which it is powerless to enrich.

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.

To have passed through life and never experienced solitude is to have never known oneself. To have never known oneself is to have never known anyone.

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.