Giacomo Casanova 17, in 1742, with a degree in law ("for which I felt an unconquerable aversion"). His guardian's hope was that he would become an ecclesiastical lawyer. Casanova had also studied moral philosophy, chemistry, and mathematics, and was keenly interested in medicine. ("I should have been allowed to do as I wished and become a physician, in which profession quackery is even more effective than it is in legal practice.") He frequently prescribed his own treatments for himself and friends. While attending the university, Casanova began to gamble and quickly got into debt, causing his recall to Venice by his grandmother,
Giacomo Casanova the money given to him in gratitude and by trickery. Prince Charles de Ligne, who understood Casanova well, and who knew most of the prominent individuals of the age, thought Casanova the most interesting man he had ever met: "there is nothing in the world of which he is not capable." Rounding out the portrait, the Prince also stated: "Casanova", like "Don Juan", is a long established term in the English language. According to "Merriam Webster's Collegiate Dictionary", 11th ed., the noun "Casanova" means "Lover; "esp": a man who is a promiscuous and unscrupulous lover". The first usage of the