Forgiving others is essential for spiritual growth. Your experience of someone who has hurt you, while painful, is now nothing more that a thought or feeling that you carry around. These thoughts of resentment.
Forgiveness doesn't excuse their behavior. Forgiveness prevents their behavior from destroying your heart. Deciding not to forgive hurts not only the other person but you as well. Not learning to forgive hardens the heart and makes shallow the soul.
How to Forgive (Even When You Don't Really Want To)
“They caused the first wound, but you are causing the rest; this is what not forgiving does. They got it started but you keep it going. Forgive and let it go, or it will eat you alive. You think they made you feel this way, but when you won’t.