"Experiment is the only means of knowledge at our disposal. Everything else is poetry, imagination."

"Science advances funeral by funeral."

"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, …"

"The quantum hypothesis will never make the slightest sense to anyone who cannot accept the existence of a real, objective world independent of our observations."

"The human mind is the most complex and mysterious thing in the universe."