Anger and resentment keep us anchored to the past and perpetuate the link with all those who have made us suffer or that we caused to suffer.
There can be no true overcoming of the ego without forgiveness in the Oneness. “Now I can let you go, I forgive you and I forgive myself. I bless you and thank you. Now that I have freed you, I too am free.”
The act of forgiveness unties each and every knot. Only Love  sets us free.