"The world is not to be understood by reason alone. It is also to be understood by intuition and feeling."

"The fundamental laws of physics are statistical. They do not determine precisely what will happen, but only the probability of what will happen."

"The only constant in life is change."

"A theoretical science, if it is to be healthy, must be able to hold its own against the practical application of its theories."

"The world is a symphony, and we are the instruments."