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

Physics is essentially an intuitive and concrete science. Mathematics is only a means for expressing the laws that govern phenomena.

The Universe is difficult to comprehend because it is obvious.

Don't wait for miracles, your whole life is a miracle.

In every true searcher of Nature there is a kind of religious reverence.

When I'm judging a theory, I ask myself whether, if I were God, I would have arranged the world in such a way.

We must not conceal from ourselves that no improvement in the present depressing situation is possible without a severe struggle; for the handful of those who are really determined to do something is minute in comparison with the mass of the lukewarm and the misguided. And those who have an interest in keeping the machinery of war going are a very powerful body; they will stop at nothing to make public opinion subservient to their murderous ends.