Envy ... is one form of a vice, partly moral, partly intellectual, which consists in seeing things never in themselves but only in their relations.

Teachers are more than any other group the guardians of civilization.

All exact science is dominated by the idea of approximation.

Even in the most purely logical realms, it is insight that first arrives at what is new.

Undoubtedly the desire for food has been and still is one of the main causes of political events.

You must believe that you can help bring about a better world. A good society is produced only by good individuals, just as truly as a majority in a presidential election is produced by the votes of single electors.

Worry is a form of fear, and all forms of fear produce fatigue. A man who has learned not to feel fear will find the fatigue of daily life enormously diminished.