The concept of vengeance often hinges on the offender's realization of their wrongdoing. In the quote from Arthur Conan Doyle's "A Study in Scarlet," it is suggested that mere retribution lacks fulfillment if the wrongdoer does not comprehend the reasons behind their punishment. The true satisfaction in vengeance comes from the offender understanding the motive and recognizing the consequences of their actions.

This reflection underscores a deeper psychological aspect of justice, where the emotional satisfaction is tied not just to the act of retribution, but also to the awareness of the offender. Without this understanding, the act of vengeance may feel hollow, lacking the emotional closure that can only be achieved when one fully grasps the impact of their deeds on others.