I think I can safely say that nobody understands Quantum Mechanics.

The other thing that gives a scientific man the creeps in the world today are the methods of choosing leaders - in every nation. Today, for example, in the United States, the two political parties have decided to employ public relations men, that is, advertising men, who are trained in the necessary methods of telling the truth or lying in order to develop a product.

Some people say, "How can you live without knowing?" I do not know what they mean. I always live without knowing. That is easy. How you get to know is what I want to know.

The highest forms of understanding we can achieve are laughter and human compassion.

If we want to solve a problem that we have never solved before, we must leave the door to the unknown ajar.

It is scientific only to say what is more likely and what less likely, and not to be proving all the time the possible and impossible.

Physicists like to think that all you have to do is say, these are the conditions, now what happens next?