Henri Poincaré
Taken from Gateway to the Great Books, Volume Nine: Mathematics (1990)
Every phenomenon, however minute, has a cause; and a mind infinitely powerful, infinitely well informed about the laws of nature, could have foreseen it from the beginning of the centuries. If such a mind existed, we could not play with it at any game of chance; we should always lose.
Chance is only the measure of our ignorance.