"To be a good scientist, one must be a good philosopher."

"My original decision to devote myself to science was a direct result of the discovery, which has never ceased to fill me with enthusiasm, that the laws of nature are accessible to human thought."

"An important scientific innovation rarely makes its way by gradually winning over and converting its opponents: it rarely happens that Saul becomes Paul."

"The world is not a collection of things, but a collection of events."

"The quantum of action plays a fundamental role in atomic theory."