During the last century, and part of the one before, it was widely held that there was an unreconcilable conflict between knowledge and belief.

I no longer believed in the known God of the Bible, but rather in the mysterious God expressed in nature.

To raise new questions, new possibilities, to regard old problems from a new angle, requires creative imagination and marks real advance in science.

You are right in speaking of the moral foundations of science, but you cannot turn around and speak of the scientific foundations of morality.

It is a very high goal which, with our weak powers, we can reach only very inadequately, but which gives a sure foundation to our aspirations and valuations.

One must not attempt to justify them, but rather to sense their nature simply and clearly.

The next world war will be fought with stones.