Nursing a grudge brings instant relief but lasting hurt;
(but they were wrong!!...they did me wrong!!... they deserve to be brought to justice!!...they deserve to hurt!!) these feelings and similar will remain until Jesus comes. This object (hardness of heart) that is not in motion will remain not in motion until acted upon (from the inside or outside.) Allowing God's Word to work from the inside is the commanded method...funerals, working from the outside, is another.
Forgiveness brings instant hurt but lasting relief.
The restoration of fellowship, reconciliation, overflow of God's love may cause a temporary sense of loss, but, knowing that we've pleased our God...that we are obeying Him, and knowing that the watching world will again be reminded that our God reigns(!)...such lasting relief!!