No New Tale to Tell

I believe every tale is unique. Of course they can can be categorized into genres, but the essence of the story is unique. The theme, mood, and tone may be the same, but the way the story convenes it is distinct. There will always be a new tale to tell.
The Pardoner's tale is about three men who are overcome by greed; it reinforces the message that greed is the root of all evil. This moral has definitely been used in many other tales. However, that does not mean that the Pardoner's tale is not unique; he tells the moral through his own unique tale. The Pardoner incorporates his own characters and rhymes into his tale so that he sets it apart from other stories.
The tale of the Fisherman and the Fish also conveys the moral that greed is bad. The fisherman catches a golden fish who promises to grant wishes for its freedom. The fisherman's wife asks for increasingly luxurious wishes until the fish finally puts the fisherman and his wife back in their old home. By having too much greed, they end up back where they started. The theme of both tales are the same, but told vastly differently. Every tale is unique.