The prologue definitely has a moral lesson attached to it. He teaches the readers that greed and corruption are not everything. He overexaggerates the little things, like the detailing of the clothing, to emphasize how corrupt a person is. For example, when talking about the monk, Chaucer writes that he is the humblest man in all of the kingdom, and yet he owns the finest fur coat of all the land, showing that he is corrupt. None of the characters have a moral compass, and Chaucer wants the readers to understand that everyone must have one. If not, they will die with all the money in the world, but they will die with a broken and sad heart.