When a certain person was saying that preset matters of economy should be detailed, someone replied that this is not good at all. It is a fact that fish will not live where the water is too clear. But if there is duckweed or something, the fish will hide under its shadow and thrive. Thus, the lower classes will live in tranquility if certain matters are a bit overlooked or left unheard. This fact should be understood with redgard to people’s conduct.