I wish to work miracles; – it may be that I shall possess less than other men of more peaceful lives, or than those who want to grow rich in a day.  I may live for a long time in great poverty, as always happens, and to all eternity will happen, to alchemists, the would-be creators of gold and silver, and to engineers who would have dead water stir itself into life and perpetual motion, and to those supreme fools, the necromancer and the enchanter.  —  Leonardo da Vinci