Somebody says something to you that is rude or designed to hurt. Instead of going into unconscious reaction and negativity, such as attack, defense, or withdrawal, you let it pass right through you. Offer no resistance. It is as if there is nobody there to get hurt anymore. That is forgiveness.
In this way, you become invulnerable. You can still tell that person that his or her behavior is unacceptable, if that is what you choose to do. But that person no longer has the power to control your inner state. You are then in your power—not in someone else’s, nor are you run by your mind.