Both the man of science and the man of action live always at the edge of mystery, surrounded by it.

Some day science may have the existence of mankind in power, and the human race can commit suicide by blowing up the world.

Politicians should read science fiction, not westerns and detective stories.

Freedom is absolutely necessary for the progress in science and the liberal arts.

All good criticism should be judged the way art is. You shouldn't read it the way you read history or science.