"There is no matter as such! All matter originates and exists only by virtue of a force which brings the particle of an atom to vibration."

"My Führer! I am most deeply shaken by the message that my son Erwin has been sentenced to death by the People's Court. The acknowledgement for my achievements in service of our fatherland, which you, …"

"No burden is so heavy for a man to bear as a succession of happy days."

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

"When we consider the development of science, we cannot help noticing that it is in many places the work of individuals who, in opposition to the general current of their time, have succeeded in imposi…"