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.

No problem is ever solved in the same consciousness thas was used to create it.

The fanatical atheists are like slaves who are still feeling the weight of their chains which they have thrown off after hard struggle. They are creatures who—in their grudge against traditional religion as the "opium of the masses"—cannot hear the music of the spheres.

Classical thermodynamics ... is the only physical theory of universal content which I am convinced ... will never be overthrown.

I see in Nature a magnificent structure... that must fill a thinking person with a feeling of humility.

The state was made for man, not man for state.

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