"The present is the only thing that has no end."

"I am very astonished that the scientific picture of the real world around me is very deficient. It gives a lot of factual information, puts all our experience in a magnificently consistent order, but …"

"The world is a book, and those who do not travel read only one page."

"The greatest discovery of all is that the universe is alive."

"The quantum theory is an 'unpleasant' theory, which I should have liked to assume to be true only if I were forced to do so by the facts."