To forgive is to deliberately decide and to actually do good toward those who have not been good to the forgiver. One can accept a situation by having indifference or annoyance toward the offending person. In other words, while accepting the situation, a person might say, “The one who offended me is at so low a moral level that this is not worth a fight. I accept what happened and I move on.” Forgiveness includes seeing the inherent worth in the other.
Research shows that as people genuinely forgive, their anger can go down significantly as can anxiety and psychological depression. The “mechanism” for forgiving includes a number of steps in the process of forgiveness that are detailed in my books, Forgiveness Is a Choice, The Forgiving Life, and 8 Keys to Forgiveness. The gist of the “mechanism” is this: The forgiver commits to doing no harm to the offending person, struggles to see the inherent worth of the other (not because of what was done, but in spite of this), and then patiently awaits the development of compassion toward the other.