One must shy away from questionable undertakings, even when they bear a high-sounding name.

In their struggle for the ethical good, teachers of religion must have the stature to give up the doctrine of a personal god.

The great moral teachers of humanity were in a way artistic geniuses in the art of living.

Fraulein Noether was the most significant creative mathematical genius thus far produced since the higher education of women began.

If I had only one hour to save the world, I would spend fifty-five minutes defining the problem, and only five minutes finding the solution.

Smoke like a chimney, work like a horse, eat without thinking, go for a walk only in really pleasant company.

Do you believe in miracles? Well, you should. In fact, life itself is a big miracle. There are so many things that are beyond our understanding. There are two ways to live: you can live as if nothing is a miracle; you can live as if everything is a miracle.