Unforgiveness gets "shut up in our bones" and can make us very bitter. Also as the Lord's Prayer states we are forgiven as we forgive others. When you forgive another, you are set free in Christ and the other is set free from your judgement.
I guess the fact that you are asking shows some need. If you have recurring negative thoughts or dreams. sometimes it shows up in repetitive hurtful behavior or just running "old tapes" in your mind. A big clue is when you cannot forgive someone.
Just contact us at firstname.lastname@example.org and let us know you are interested. Of course talk to your pastor first. Then we will be glad to talk with your pastor and if you desire, we will bring an Introduction to Healing event to your church. See our web site for more explanation.
“Bring the Love, Healing, and Reconciliation of Jesus Christ to all