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

"Light and justice are not goods, but they are the condition of goods."

"The electron is not a thing but an abstraction."

"When we speak of the electron, we are not speaking of something that really exists, but of something that we have imagined."

"If we would understand the atom, we must be able to describe it in its totality, and not merely in its parts."