The road to perdition has ever been accompanied by lip service to an ideal.

Any power must be an enemy of mankind which enslaves the individual by power and by force, whether it arises under the Fascist or the Communist flag. All that is valuable in human society depends upon the opportunity for development accorded to the individual.

Most people stop looking when they find the proverbial needle in the haystack. I would continue looking to see if there were other needles.

Man is, at one and the same time, a solitary being and a social being.

Understanding of our fellow human beings...becomes fruitful only when it is sustained by sympathetic feelings in joy and sorrow.

The mere formulation of a problem is far more essential than its solution, which may be merely a matter of mathematical or experimental skills. To raise new questions, new possibilities, to regard old problems from a new angle requires creative imagination and marks real advances in science.

People should be more like animals . . . they should be more intuitive; they should not be too conscious of what they do while they do it.