Truth is a shining goddess, always veiled, always distant, never wholly approachable, but worthy of all the devotion of which the human spirit is capable.

Science is what you know, philosophy is what you don't know.

The first dogma which I came to disbelieve was that of free will. It seemed to me that all notions of matter were determined by the laws of dynamics and could not therefore be influenced by human wills.

To like many people spontaneously and without effort is perhaps the greatest of all sources of personal happiness.

In considering irregular appearances, there are certain very natural mistakes which must be avoided.

In human relations one should penetrate to the core of loneliness in each person and speak to that.

Neither a man nor a crowd nor a nation can be trusted to act humanely or to think sanely under the influence of a great fear.