Final answer:
The quote means that a wrong is not truly corrected if seeking revenge harms the avenger or if the wrongdoer doesn't realize they are being punished.
Step-by-step explanation:
In Edgar Allan Poe's 'The Cask of Amontillado,' the character Montresor suggests that a wrong is not properly addressed ('unredressed') if the act of retribution, or punishment, ends up harming the person seeking revenge ('redresser').
It implies that for revenge to be satisfactory, it must be enacted without bringing any harm or consequences back onto the person delivering it. Additionally, the vengeance should be recognized by the wrongdoer, ensuring they understand why they are being punished.
The concept depicted by the quote is seen throughout history and literature, where the desire for payback can sometimes lead to a cycle of violence. It's a delicate balance where justice should be served without inflicting damage on the one pursuing it. This idea reflects upon a broader context of human behavior, where systems of justice and personal morals intersect.