The word 'God' is for me nothing more than the expression and product of human weaknesses, and religious scripture a collection of honourable, but still primitive legends which are nevertheless pretty childish. No interpretation, no matter how subtle, can (for me) change this.

It is entirely possible that behind the perception of our senses, worlds are hidden of which we are unaware.

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.

People start their lives at last when they are able to live for something other than themselves.

How vile and despicable war seems to me! I would rather be hacked to pieces than take part in such an abominable business.

If you do the same thing over and over again you cannot ever expect a different outcome.

My success wasn't so much due to intelligence, but the fact that I stuck with problems longer.