The measurement we get when we measure something is not a property of the thing measured.

We depend on our words... Our task is to communicate experience and ideas to others. We must strive continually to extend the scope of our description, but in such a way that our messages do not thereby lose their objective or unambiguous character... We are suspended in language in such a way that we cannot say what is up and what is down. The word "reality" is also a word, a word which we must learn to use correctly.

There is no hope for any speculation that does not look absurd at first glance.

The present state of atomic theory is characterized by the fact that we not only believe the existence of atoms to be proved beyond a doubt, but also we even believe that we have an intimate knowledge of the constituents of the individual atoms.

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.

The best weapon of a dictatorship is secrecy, but the best weapon of a democracy should be the weapon of openness.

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