Not all things worth counting are countable and not all things that count are worth counting.

Since I have introduced this term I had always a bad conscience. . . . I cannot help to feel it strongly and I am unable to believe that such an ugly thing should be realized in nature.

In a sailboat I become oblivious to everything else in the world.

The aim (of education) must be the training of independently acting and thinking individuals who, however, see in the service to the community their highest life problem.

Knowledge is limited.

It would be my greatest sadness to see Zionists (Jews) do to Palestinian Arabs much of what Nazis did to Jews.

Compound interest on debt was the banker's greatest invention, to capture, and enslave, a productive society.