If God has created the world, his primary worry was certainly not to make its understanding easy for us

I have only two rules which I regard as principles of conduct. The first is: Have no rules. The second is: Be independent of the opinion of others.

It's very depressing to live in a time where it's easier to break an atom than a prejudice.

This is a time, when there seems to be a particular need for friends of wisdom and truth to join together.

The definition of genius is taking the complex and making it simple.

Art is the expression of the profoundest thoughts in the simplest way.

One should guard against preaching to young people success in the customary form as the main aim in life. The most important motive for work in school and in life is pleasure in work, pleasure in its result, and the knowledge of the value of the result to the community.