Werner Heisenberg

The problems of language here are really serious. We wish to speak in some way about the structure of the atoms… but we cannot speak about atoms in ordinary language.

I am sure that the life of the atom is a very complicated thing.

The world is not a clockwork.

Science is not about certainty. Science is about finding the most reliable way of thinking at the present level of knowledge.

The opposite of a correct statement is a false statement. But the opposite of a profound truth may be another profound truth.

Only a few know, how much one must know to know little.

The universe corresponds to a well-ordered and harmonious whole.

In science one tries to tell people, in such a way as to be understood by everyone, something that no one ever knew before. But in poetry, it's the other way around.

The theoretical determination of the fine structure constant is certainly one of the most important problems of quantum electrodynamics.

My mind is not made up yet. I think it will be difficult to get a clear picture of the situation.

We are all in the same boat, and we have to help each other.

The atom has changed everything, save man's thinking. And thus we drift toward unparalleled catastrophe.

The release of atom power has changed everything except our way of thinking...the solution to this problem lies in the heart of mankind.

If atoms do behave like this, one can perhaps not speak of the path of the electron.

The velocity of light is so great that one who is not specially conversant with the subject might think that we could have no adequate method of determining it.

I have no hope for the future of physics if it is to be practiced by those who are satisfied with the present state of knowledge.

The history of our time is the history of the atom.

God may be subtle, but he isn't plain mean.

It was about three in the morning... I had a peculiar feeling of discomfort so that I could not continue my work.

The noble gas of laughter is helium.