"Physics is not about how the world is, it is about what we can say about the world."

"The electron is not a 'thing' in the ordinary sense, but a 'tendency to exist'."

"The fundamental problem of all science is the description of the world."

"The meaning of life does not consist in the mere fact of existing, but in the power of perceiving and making known our existence, and that of others."

"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."