Love is a better teacher than duty.

Schools need not preach political doctrine to defend democracy. If they shape men capable of critical thought and trained in social attitudes, that is all that is necessary.

There exists a passion for comprehension, just as there exists a passion for music. That passion is rather common in children, but gets lost in most people later on. Without this passion there would be neither mathematics nor natural science.

If I would be a young man again and had to decide how to make my living, I would not try to become a scientist or scholar or teacher. I would rather choose to be a plumber or a peddler in hope to find that modest degree of independence still available under present circumstances.

I am not only a pacifist but a militant pacifist. I am willing to fight for peace. Nothing will end war unless the people themselves refuse to go to war.

We must begin to inculcate our children against militarism by educating them in the spirit of pacifism. Our schoolbooks glorify war and conceal it's horror. I would teach peace rather than war.

This is too difficult for a mathematician. It takes a philosopher. The hardest thing in the world to understand is the income tax.