If you thought that science was certain - well, that is just... - Richard Feynman

"Philosophy of science is about as useful to scientists as ornithology is to birds."

"We are trying to prove ourselves wrong as quickly as possible, because only in that way can we find progress."

"We are at the very beginning of time for the human race. It is not unreasonable that we grapple with problems. But there are tens of thousands of years in the future. Our responsibility is to do what we can, learn what we can, improve the solutions, and pass them on."

"Religion is a culture of faith; science is a culture of doubt."

"The first principle is that you must not fool yourself and you are the easiest person to fool."