Final answer:
Montresor's revenge on his enemy is a key theme in the story "The Cask of Amontillado" by Edgar Allan Poe.
Step-by-step explanation:
The subject of this question is English.
In the given passage, Montresor never forgave his enemy for insulting him and instead waited years to get his revenge. Montresor's actions indicate a desire for revenge and an inability to forgive.
This story is a famous short story called "The Cask of Amontillado" by Edgar Allan Poe. In this story, Montresor's revenge on his enemy Fortunato is a key theme.