What theme about life does Poe communicate in The Cask of Amontillado?

One theme about life that Poe communicates in "The Cask of Amontillado" is the destructive nature of revenge. The story explores the consequences of allowing one's desire for vengeance to consume them, ultimately leading to tragic outcomes for both the victim and the perpetrator. Poe also delves into the theme of deception and betrayal, showcasing how these elements can have deadly consequences when taken to extreme levels.