"One should as a rule respect public opinion in so far as is necessary to avoid starvation and to prevent one's work from being suppressed, but anything that goes beyond this is voluntary submission to an unnecessary tyranny."
"The first gulp from the glass of natural sciences will turn you into an atheist, but God is waiting for you at the bottom of the glass."
"What we observe is not nature itself, but nature exposed to our method of questioning."
"An expert is a person who has made all the mistakes that can be made in his field."
"The atoms or elementary particles themselves are not real; they form a world of potentialities."