Don't second guess the mistakes you've made, others will do that for you. Make things as simple as possible, but not simpler.

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.

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.

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.

As far as the laws of mathematics refer to reality, they are not certain, and as far as they are certain, they do not refer to reality.

It is abhorrent to me when a fine intelligence is paired with an unsavory character.

A theory can be proved by experiment; but no path leads from experiment to the birth of a theory.