Why do they [Americans] quarrel, why do they hate Negroes, Indians, even Germans, why do they not have science and poetry commensurate with themselves, why are there so many frauds and so much nonsense?

There is nothing in this world that I fear to say.

Certain characteristic properties of elements can be foretold from their atomic weights.

The edifice of science not only requires material, but also a plan. Without the material, the plan alone is but a castle in the air-a mere possibility; whilst the material without a plan is but useless matter.

No law of nature, however general, has been established all at once; its recognition has always been preceded by many presentiments.

I have achieved an inner freedom.

I have to talk like this! It`s my job