Every animal leaves traces of what it was; man alone leaves traces of what he created.

Einstein was a man who could ask immensely simple questions. And what his work showed is that when the answers are simple too, then you can hear God thinking.

The richness of human life is that we have many lives, we live the events that do not happen (and some that cannot) as vividly as those that do, and if thereby we die a thousand deaths, that is the price we pay...

One aim of physical sciences had been to give an exact picture the material world. One achievement of physics in the twentieth century has been to prove that that aim is unattainable.

Every judgment in science stands on the edge of error, and is personal.

To me the most interesting thing about man is that he is an animal who practices art and science and in every known society practices both together.

The largest single step in the ascent of man is the change from nomad to village agriculture.