Forgiveness - one of the hardest attributes to attain when you have been hurt, feel pain from someone else. As being, we should follow God's model and forgive even when forgiveness isn't deserved. We do this for our own benefit, to release bitterness and resentment, and to allow for our own internal peace. If you are the person causing harm, you should follow the 4 R's (Responsibility, Remorse, Restoration, and Renewal) in order to genuinely apologize and seek forgiveness. This will help the person you harmed with forgiving you. Godly sorrow, repent.