Being engulfed in practice without delicate knowledge related to it, is in many ways like entering a ship without knowing where it is headed.
Leonardo da VinciThough I may not . . . be able to quote other authors, I shall rely on that which is much greater and more worthy - on experience.
Leonardo da VinciNothing will be left, Nothing in the air, nothing under the earth, nothing in the waters. All will be exterminated.
Leonardo da Vinci