David was the son of a famous Venetian rabbi. From his youth he had been accustomed to debate good principles and right conduct with all sorts of grave Jewish persons. These conversations had formed his own character and he naturally supposed that a small measure of the same could not help but improve other people's. In short he had come to believe that if only one talks long enough and expresses oneself properly, it is perfectly possible to argue people into being good and happy. With this aim in mind he generally took it upon himself to quarrel with Tom Brightwind several times a week -- all without noticeable effect.