Prediction is very difficult, especially if it's about the future.

When asked ... [about] an underlying quantum world, Bohr would answer, 'There is no quantum world. There is only an abstract quantum physical description. It is wrong to think that the task of physics is to find out how nature is. Physics concerns what we can say about Nature.'

When searching for harmony in life one must never forget that in the drama of existence we are ourselves both actors and spectators.

If you have a correct statement, then the opposite of a correct statement is of course an incorrect statement, a wrong statement. But when you have a deep truth, then the opposite of a deep truth may again be a deep truth.

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.

You must come to Copenhagen to work with us. We like people who can actually perform thought experiments!

Predition is risky, especially of the future.