How wonderful that we have met with a paradox. Now we have some hope of making progress.
Sometimes the child in one behaves a certain way and the rest of oneself follows behind, slowly shaking its head.
The meaning of life consists in the fact that it makes no sense to say that life has no meaning.
There are trivial truths and the great truths. The opposite of a trivial truth is plainly false. The opposite of a great truth is also true.
What is that we human beings ultimately depend on? We depend on our words. We are suspended in language. Our task is to communicate experience and ideas to others.
Every valuable human being must be a radical and a rebel, for what he must aim at is to make things better than they are.
If an idea does not appear bizarre, there is no hope for it.
When searching for harmony in life one must never forget that in the drama of existence we are ourselves both actors and spectators.
The great extension of our experience in recent years has brought light to the insufficiency of our simple mechanical conceptions and, as a consequence, has shaken the foundation on which the customary interpretation of observation was based.
Isolated material particles are abstractions, their properties being definable and observable only through their interaction with other systems .
It is wrong to think that the task of physics is to find out how Nature is. Physics concerns what we say about Nature.
The opposite of every great idea is another great idea.
Address to Albert Einstein: You are not thinking. You are merely being logical.
You must come to Copenhagen to work with us. We like people who can actually perform thought experiments!
When it comes to atoms, language can be used only as in poetry.
We are trapped by language to such a degree that every attempt to formulate insight is a play on words.
Every great and deep difficulty bears in itself its own solution. It forces us to change our thinking in order to find it.
Every sentence I utter must be understood not as an affirmation, but as a question.
Those who are not shocked when they first come across quantum theory cannot possibly have understood it.
We are all agreed that your theory is crazy. The question which divides us is whether it is crazy enough to have a chance of being correct. My own feeling is that it is not crazy enough.