Those who want, or are otherwise waiting, for so-called closure find it hard to let go and forgive---especially the latter. The want acceptance, after a fashion, but they also want to hold on to their pain, their anger, their resentment, and their bitterness. Like Lot’s wife, they are constantly looking back at the dreadful thing that happened to them. Like Lot’s wife, they will be turned into a pillar of salt---unless they 'wake up.' Yes, these people will have absolutely no serenity whatsoever until they accept, forgive and let go---absolutely and unconditionally. These people will never truly get the ‘closure’ they are seeking---because there is no such thing as closure, at least not in the sense they are using the term.
You see, closure is not something that happens to you---if you wait long enough, and are 'lucky.' That's the problem with the 'conventional wisdom' with respect to closure. It shifts the responsibility for getting better from oneself to others or to circumstances outside oneself ('conditions' or 'situations'). No, you alone are responsible for effecting due and proper closure---that is, unconditional acceptance---and it happens instantaneously and immediately when you accept things as they are. But first you must be willing for that to happen. Ah, there's the rub! You must want your freedom more than you want to hold on to your pain, anger, resentment and bitterness. It's a choice, and an act of the will---although no so-called 'will power' is involved or required. You make a decision that enough is enough---that it's time to let go and move on. Your whole life depends upon it. It's crunch time.