“Life isn't worth living, unless it is lived for someone else.”

“The most incomprehensible thing about the world is that it is at all comprehensible.”

“I love Humanity but I hate humans”

“Which came first the observer or the particle?”

“Which came first — the observer or the particle?”

“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.”