Terry:
I would separate forgiveness from resentment altogether.
For one's own sake it is better to measure how much liklihood there is of taking action to bring a criminal or offender to just desserts. If it is impossible; let go of the rage and move on. However, forgiveness is not necessary to do that. You do as much as you can feasibly do to close the circle of justice. Beyond that you cannot do anything.
To forgive is to PARDON. In other words, when you forgive you let the offender off Scot Free!
for·give 

/ f?r'g?v / Pronunciation Key - Show Spelled Pronunciation [ fer-giv ] Pronunciation Key - Show IPA Pronunciation verb, -gave, -giv·en, -giv·ing. –verb (used with object)
1. | to grant pardon for or remission of (an offense, debt, etc.); absolve. |
2. | to give up all claim on account of; remit (a debt, obligation, etc.). |
3. | to grant pardon to (a person). |
4. | to cease to feel resentment against: to forgive one's enemies. |
5. | to cancel an indebtedness or liability of: to forgive the interest owed on a loan. |
–verb (used without object)
6. | to pardon an offense or an offender. |
Ceasing resentment is an essential part of forgiveness. It is an act of letting your own mind and body off "scot free". That you no-longer may pay the heavy price of the past that eats away at you.
It is often our bitterness that reinforces a sense of separation from others that opens the door to crime and man's inhumanity to man. If we were all to cease resentment it would pretty much put an end to the vicious circle of crime and punishment. If anything this gets to the very root of the problem.
That you want to leave this out of the equation, Terry, it's little wonder it makes no sense.
j