Knowledge that does not generate achievement is a pale and bloodless thing, unworthy of mankind.

Peace is an unstable equilibrium, which can be preserved only by acknowledged supremacy or equal power.

In the last analysis civilization is based upon the food supply.

To speak ill of others is a dishonest way of praising ourselves; let us be above such transparent egotism. If you can't say good and encouraging things, say nothing. Nothing is often a good thing to do, and always a clever thing to say.

The most interesting thing in the world is another human being who wonders, suffers and raises the questions that have bothered him to the last day of his life, knowing he will never get the answers.

Liberty is a luxury of security; the free individual is a product and a mark of civilization.

Who will dare to write a history of human goodness?