“He who wishes to be rich in a day will be hanged in a year. How many prime ministers and how many presidents have lived and died and no record of them remains, and they only sought to gain dominions and riches in order that their fame might be ever-lasting. Anyone who conducts an argument by appealing to authority is not using his intelligence; he is just using his memory. He who loves practice without theory is like the sailor who boards ship without a rudder and compass and never knows where he may cast.”