The facts we see depend on where we are placed and the habits of our eyes.

When all think alike, then no one is thinking

We forge gradually our greatest instrument for understanding the world - introspection. We discover that humanity may resemble us very considerably - that the best way of knowing the inwardness of our neighbors is to know ourselves.

Freedom to speak... can be maintained only by promoting debate.

Certainly he is not of the generation that regards honesty as the best policy. However, he does regard it as a policy.

It is often very illuminating...to ask yourself how you got at the facts on which you base your opinion. Who actually saw, heard, felt, counted, named the thing, about which you have an opinion?

Robinson Crusoe, the self-sufficient man, could not have lived in New York city.