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

"All matter originates and exists only by virtue of a force… We must assume behind this force the existence of a conscious and intelligent Mind. This Mind is the matrix of all matter."

"Physics is a branch of knowledge which aims at the discovery of the laws governing the phenomena of nature."

"Physics is a science of the real world, not of the subjective impressions of the individual."

"The man who has not passed through the bitter experience of doubt, has not made a single step forward in science."