Prediction is very difficult, especially about the future. - Niels Bohr

"You can recognize a small truth because its opposite is a falsehood. The opposite of a great truth is another truth."

"Prediction is very difficult, especially about the future."

"The opposite of a correct statement is a false statement. But the opposite of a profound truth may well be another profound truth."

"Stop telling God what to do with his dice."

"An expert is a person who has made all the mistakes that can be made in a very narrow field."