Those who are not shocked when they first come across quantum theory cannot possibly have understood it.

The very nature of the quantum theory ... forces us to regard the space-time coordination and the claim of causality, the union of which characterizes the classical theories, as complementary but exclusive features of the description, symbolizing the idealization of observation and description, respectively.

We must be clear that when it comes to atoms, language can be used only as in poetry. The poet, too, is not nearly so concerned with describing facts as with creating images and establishing mental connections.[About describing atomic models in the language of classical physics:]

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

If you can fathom quantum mechanics without getting dizzy, you don't get itEt kvantebitte spring nærmere supercomputeren

Anyone not shocked by quantum mechanics has not yet understood it.