“In choosing a hypothesis there is no virtue in being timid. I clearly would have been burned at the stake in another age.”

“God can use the jawbone of an ass!”

“Honest, open communication is the only street that leads us into the real world... We then begin to grow as never before. And once we are on this road, happiness cannot be far away.”

“I am constantly trying to communicate something incommunicable, to explain something inexplicable, to tell about something I only feel in my bones and which can only be experienced in those bones. ...”

“I do not know what I may appear to the world, but to myself I seem to have been only like a boy playing on the sea-shore, and diverting myself in now and then finding a smoother pebble or a prettie...”

“To know the history of science is to recognize the mortality of any claim to universal truth. ”

“The scientist only imposes two things, namely truth and sincerity, imposes them upon himself and upon other scientists.”

“No more war! Never again war! If you wish to be brothers, drop your weapons.”

“If you wish to be loved, show more of your faults than your virtues.”

“I wish it, I command it. Let my will take the place of a reason.”