Friedrich Wieck practice, however, he might not always have lived up to the ideals he described in the book "Piano and Song: How to Teach, How To Learn, and How to Form a Judgment of Musical Performances." When Robert Schumann was living and studying in the Wieck household, he reported seeing Wieck punishing his nine-year-old son, Alwyn, for playing the violin poorly, tearing at his hair and yelling, "You wretch, you scoundrel, is this the way you try to please your father?" Clara seemed unconcerned at the violent scene. Shocked, Schumann wrote in his diary, "Am I among human beings?" Besides the
Friedrich Wieck to spreading vicious rumours against the couple. He sent copies of his court documents to every city where Clara was planning to give concerts. When she traveled to Hamburg and Berlin to perform, he sent letters claiming that Clara's playing had declined. Striking an emotional blow against Clara, he began to promote the career of a rival female pianist, Camilla Pleyel. In July 1840, the court ruled against Wieck, and it gave consent to the marriage. Schumann then sued Wieck for slander and won. Wieck was forced to pay the couple a large sum, and he was sentenced to jail