One of the most difficult things we humans are ever called upon to do is to respond to evil with kindness, and to forgive the unforgivable. We love to read stories about people who have responded to hatred with love, but when that very thing is demanded of us personally, our default seems to be anger, , depression, self-righteousness, hatred, etc.It shows that when you forgive you live a longer and good health life. When a person  is to developing a habit of gratitude and let go of past hurts. Want to live a long, happy life? Forgive the unforgivable. It really is the kindest thing you can do for yourself. Your enemy may not deserve to be forgiven for all the pain and sadness and suffering purposefully inflicted on your life, but you deserve to be free of this evil.  "hate is like an acid. It damages the vessel in which it is stored, and destroys the vessel on which it is poured.