A stupid man's report of what a clever man says can never be accurate, because he unconsciously translates what he hears into something he can understand.

Mathematics takes us into the region of absolute necessity, to which not only the actual word, but every possible word, must conform.

The main thing needed to make men happy is intelligence.

It is the things for which there is no evidence that are believed with passion.

In a logically perfect language, there will be one word and no more for every simple object, and everything that is not simple will be expressed by a combination of words, by a combination derived, of course, from the words for the simple things that enter in, one word for each simple component.

Americans need rest, but do not know it.

The whole realm of thought and opinion is utterly unsuited to public control; it ought to be as free, and as spontaneous as is possible. The state is justified in insisting that children shall be educated, but it is not justified in forcing their education to proceed on a uniform plan and to be directed to the production of a dead level of glib uniformity.