Ephesians 4:32
(NIV)“Be kind and compassionate to one another, forgiving each other, just as in Christ God forgave you.”
Context
Paul writes this to a multicultural early church full of real interpersonal conflict, slaves and slaveowners, Jews and Gentiles, families divided by faith. Forgiveness was the only way they survived as a community.
For your life
The model isn't 'forgive because they deserve it.' It's 'forgive because you've been forgiven.' Different starting point, different math.