Predition is risky, especially of the future.

An independant reality in the ordinary physical sense can neither be ascribed to the phenomenon nor to the agencies of observation.

No paradox, no progress.

When it comes to atoms, language can be used only as in poetry.

In our description of nature the purpose is not to disclose the real essence of the phenomena but only to track down, so far as it is possible, relations between the manifold aspects of our experience.

It is wrong to think that the task of physics is to find out how nature is. Physics concerns what we say about nature.

It is very difficult to make an accurate prediction, especially about the future.