What happens depends on our way of observing it or on the fact that we observe it.
What we observe is not nature itself, but nature exposed to our method of questioning.
Every word or concept, clear as it may seem to be, has only a limited range of applicability.
A consistent pursuit of classical physics forces a transformation in the very heart of that physics.
We have to remember that what we observe is not nature in itself but nature exposed to our method of questioning.
Natural science, does not simply describe and explain nature; it is part of the interplay between nature and ourselves.
The existing scientific concepts cover always only a very limited part of reality, and the other part that has not yet been understood is infinite.
Whenever we proceed from the known into the unknown we may hope to understand, but we may have to learn at the same time a new meaning of the word 'understanding'.
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.
The violent reaction on the recent development of modern physics can only be understood when one realises that here the foundations of physics have started moving; and that this motion has caused the feeling that the ground would be cut from science.