Learning to forgive is much more useful than merely picking up a stone and throwing it at the object of one's anger, the more so when the provocation is extreme. For it is under the greatest adversity that there exists the greatest potential for doing good, both for oneself and others.
It is not "forgive and forget" as if nothing wrong had ever happened, but "forgive and go forward," building on the mistakes of the past and the energy generated by reconciliation to create a new future.
Goodness is to do good to the deserving and love the good and hate the wicked, and not to be eager to inflict punishment or take vengeance, but to be gracious and kindly and forgiving.
Love thy neighbor as thyself: Do not do to others what thou wouldst not wish be done to thyself: Forgive injuries. Forgive thy enemy, be reconciled to him, give him assistance, invoke God in his behalf.
I am slow to listen to criminations among friends, and never espouse their quarrels on either side. My sincere wish is that both sides will allow bygones to be bygones, and look to the present & future only.