Human beings, in their thinking, feeling and acting are not free agents but are as causally bound as the stars in their motion.

I am satisfied with the mystery of life's eternity and with a knowledge, a sense, of the marvelous structure of existence - as well as the humble attempt to understand even a tiny portion of the Reason that manifests itself in nature.

... on principle, it is quite wrong to try founding a theory on observable magnitudes alone. In reality the very opposite happens. It is the theory which decides what we can observe.

There are times when one feels liberated from one’s limits and human imperfections. At such moments, we see ourselves there, in a little corner of our little planet, our eyes fixed in wonder on the cold and yet deep beauty of that which is eternal, that which is elusive. Life and death are fused together and there is no evolution, nor destination, there is only BEING.

America is a large country and its people have so far not shown much interest in great international problems, among which the problem of disarmament occupies first place today. This must be changed, if only in America's own interest. The last war has shown that there are no longer any barriers between the continents and that the destinies of all countries are closely interwoven. The people of this country must realize that they have a great responsibility in the sphere of international politics. The part of passive spectator is unworthy of this country and is bound in the end to lead to disaster all round.

The Universe is difficult to comprehend because it is obvious.

When you sit with a nice girl for two hours, it seems like two minutes; when you sit on a hot stove for two minutes, it seems like two hours. That's relativity.