The safest and best way to punish one who has done you an injustice is to do him or her a kind deed in return.
People will always respond in kind, even in greater measure than that which is delivered to them. This commonplace need for retaliation can be replaced with a response designed to convert an enemy into a friend. If you get rid of the millstone of pride, you can respond to an injustice with a kind deed. It may take time to make this work, but if you treat those who dislike you with unfailing kindness, they will eventually succumb to your influence and “retaliate” in kind. As Napoleon Hill said, “The hottest coals of fire ever heaped upon the head of one who has wronged you are the coals of human kindness.”