Transmutation changes something over into something else. Thus, a writer may transmute his life into stories or novels, and an arranger might transmute a lively march tune into a quiet lullaby. In the "Myth of Er" at the end of Plato's Republic, for example, human souls are transmuted into the body and existence of their choice. Having learned from their last life what they do not want to be, many choose transmutation into something that seems better. A meek man chooses to be transmuted into a tyrant, a farmer into a dashing (but short-lived) warrior, and so on. But very few seem to have learned anything from their former life that would make their choice a real improvement.