Learn to forgive and forget.  That’s what my grandmother always told me when I was a child.  It all seemed so easy then.  When you’re young, nothing is so important that it can’t be pushed aside, and besides, your attention span is so short, things are usually forgotten in the space of a day any way.When you get older, it gets harder.  The nasty things that adults do to each other make the indiscretions of youth seem trivial, and they are much harder to forgive and forget.  But, for our mental, physical and spiritual health, forgive we must, or we risk doing more damage to ourselves than the person who has wronged us can ever do.Whether it’s a marriage, a friendship, or a business relationship, the ability to forgive and move on is essential.  Forgiveness eliminates the toxic waste of anger and hate that can pollute our minds and souls and degrade our spirit.Forgiveness is also a handy form of revenge.  If someone has insulted you unintentionally, forgiving avoids escalating a mistake into something worse.  If the insult was intentional, forgiving it and moving on will leave the malefactor puzzled and wondering what he or she did wrong.  Leave them wondering why their barbs failed to hit the target.  That’s the best form of revenge, and then forget it and move on.  You’ll be better for it – and, even though my grandmother probably wouldn’t approve – and it feels oh so good to see a nasty person left puzzled and confused when they’ve failed to provoke anger.  Learn to forgive.  You’ll be a healthier person emotionally, and you’ll probably find fewer and fewer people trying to get at you.