Wolfgang Mozart and his father, Leopold, were frequently - and now famously - at odds. Masterminding his prodigy childrens' concert tours of Europe was one thing , but even by the time Wolfgang was 22 years old and touring Europe looking for a job, Leopold's grip on his son seemingly hadn't loosened a bit. Here's Emily Anderson's translation of some of what Leopold Mozart wrote his son in a letter of February 16, 1778: "My son! You are hot-tempered and impulsive in all your ways! Since your childhood and boyhood your whole character has changed. As a child and a boy you were serious rather than childish and when you sat at the (keyboard) or were otherwise intent on music, no one dared to have the slightest jest with you. [...] But now, as far as I can see, you are much too ready to retort in a bantering tone to the first challenge - and that, of course, is the first step towards undue familiarity, which anyone who wants to preserve his self-respect will try to avoid in this world. [...] the greatest art of all is to know oneself and then, my dear son, to do as I do, that is, to endeavour to get to know others through and through.