But the personality that finally emerges is largely formed by the environment in which a man happens to find himself during his development, by the structure of the society in which he grows up, by the tradition of that society, and by its appraisal of particular types of behavior.

I do not believe in a personal God and I have never denied this but have expressed it clearly.

My feeling is religious insofar as I am imbued with the consciousness of the insufficiency of the human mind to understand more deeply the harmony of the Universe which we try to formulate as "laws of nature".

The world is in greater peril from those who tolerate or encourage evil than from those who actually commit it.

Those who have an interest in keeping the machinery of war going will stop at nothing to make public opinion subservient to their murderous ends.

Whether or not you can observe a thing depends upon the theory you use. It is the theory which decides what can be observed.

Pure logical thinking cannot yield us any knowledge of the empirical world. All knowledge of reality starts from experience and ends in it.