What you say makes sense, but I thought the idea was that, after time passes, the revenge will have a greater impact on the person who receives it. Whatever they did to deserve revenge, let them think they got away with it. In the future they will no longer expect retaliation, forget about it, drop their guard, return to normal routines of life. And then out of the blue...WHAM!...your revenge comes raining down with shock and awe to make them regret the day they ever met you.????