[Kepler] had to realize clearly that logical-mathematical theoretizing, no matter how lucid, could not guarantee truth by itself; that the most beautiful logical theory means nothing in natural science without comparison with the exactest experience. Without this philosophic attitude, his work would not have been possible.

What separates me from most so-called atheists is a feeling of utter humility toward the unattainable secrets of the harmony of the cosmos.

Science will stagnate if it is made to serve practical goals.

Compassionate people are geniuses in the art of living, more necessary to the dignity, security, and joy of humanity than the discoverers of knowledge.

Agreements about what is good or not, are usually not worth much. It is very much like art, is it not an art to lead a good life?

He who cherishes the value of cultures cannot fail to be a pacifist.

I see in Nature a magnificent structure... that must fill a thinking person with a feeling of humility.