( I‘m a technologist just like Da Vinci was a siege engine designer, Plato administrator of a school, Bacon a Lawyer, Descartes a Soldier, Montaigne a bureaucrat, and Spinoza a lens grinder. A man must have a trade if he is not to become a parasite. Most men practice both vocations and avocations. For some they are the same. For others they are different. For Philosophers, unlike scientists, it remains an open question whether we do more harm or good. If we ply a trade we at least tip the balance in favor of good. )