Unlimited competition leads to a huge waste of labor, and to that crippling of the social consciousness of individuals.

Life is a preparation for the future; and the best preparation for the future is to live as if there were none.

As long as I have any choice in the matter, I shall live only in a country where civil liberty, tolerance and equality of all citizens before the law prevail.

Capitalism has brought with it progress, not merely in production but also in knowledge.

No worthy problem is ever solved within the plane of its original conception.

If I were not a physicist, I would probably be a musician. I often think in music. I live my daydreams in music. I see my life in terms of music.

We will never be able to solve the problems of tomorrow with the thinking of today