The thinking that got us to where we are is not the thinking that will get us to where we want to be.

A religious person is devout in the sense that he has no doubt about the significance of those superpersonal objects and goals which neither require nor are capable of rational foundation

The daily struggle does not arise from a purpose or a program, but from an immediate need.

Every one who is seriously involved in the pursuit of science becomes convinced that a spirit is manifest in the laws of the Universe-a spirit vastly superior to that of man, and one in the face of which we with our modest powers must feel humble.

Was wirklich zählt, ist Intuition

Where the world ceases to be the scene of our personal hopes and wishes, where we face it as free beings admiring, asking and observing, there we enter the realm of Art and Science.

Unless the cause of peace based on law gathers behind it the force and zeal of a religion, it hardly can hope to succeed.