How wonderful that we have met with a paradox. Now we have some hope of making progress.

There are some things so serious you have to laugh at them.

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

Every great and deep difficulty bears in itself its own solution. It forces us to change our thinking in order to find it.

If quantum mechanics hasn't profoundly shocked you, you haven't understood it yet.

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