"You have to make the rules, not follow them." - Isaac Newton

"Real knowledge is to know the extent of one's ignorance." - Confucius

"There is nothing more notable in Socrates than that he found time, when he was an old man, to learn music and dancing, and thought it time well spent." - Michel de Montaigne

"In order to seek truth, it is necessary once in the course of our life to doubt, as far as possible, of all things." - Rene Descartes