With the understanding that forgiving is not excusing or forgetting:

Whom are you unwilling to forgive? Is it a person? A political group? If forgiveness is letting go of painful hostile feelings and not the excusing of past grievances, are there still people or groups that you don't want to do that with?

Why? Why this particular object for your feelings, and why don't you want to let those feelings go?

It really says something about whether I really want to let go of certain kinds of suffering that I keep making excuses for why I shouldn't let go of my hostilities toward this or that.

This is something that I've been thinking about lately, and comments are screened (mainly because something personal might come up for someone and I don't want people passing judgement on each other or offering unsolicited advice).