Montresor claims that he wants revenge against Fortunato because Fortunato has insulted him. The nature of this insult and why it can only be avenged through Fortunato's death remains unexplained. In fact, Montresor states that: "The thousand injuries of Fortunato I had borne as I best could." This indicates that the two clearly have a long history and Montresor has clearly put up with a lot. However, something about Fortunato's insult puts Montresor over the edge and he becomes determined to get revenge. It is interesting that Montresor leaves out the nature of Fortunato's insult in telling the story of his revenge and the reader is left to wonder why it has been omitted. One is left to ponder: has the insult been left out because of Montresor's pride or has it been left out to hide its triviality?