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.

Not only is the Universe stranger than we think, it is stranger than we can think.

The reality we can put into words is never reality itself.

There is a fundamental error in separating the parts from the whole, the mistake of atomizing what should not be atomized. Unity and complementarity constitute reality.

Thus, the more precisely the position is determined, the less precisely the momentum is known, and conversely.

The solution of the difficulty is that the two mental pictures which experiment lead us to form - the one of the particles, the other of the waves - are both incomplete and have only the validity of analogies which are accurate only in limiting cases.

Every word or concept, clear as it may seem to be, has only a limited range of applicability.