I believe that a simple and unassuming manner of life is best for everyone, best both for the body and the mind.

A perfection of means, and confusion of aims, seems to be our main problem.

Make everything as simple as possible, but not simpler.

By an application of the theory of relativity to the taste of readers, today in Germany I am called a German man of science, and in England I am represented as a Swiss Jew. If I come to be represented as a bête noire, the descriptions will be reversed, and I shall become a Swiss Jew for the Germans and a German man of science for the English!

The genius is in making the complex simple.

[Ernest Rutherford is]...a second Newton.

As the area of light expands, so does the perimeter of darkness.