Self knowledge

People, people did this to me, people did that to me, a common thought which comes often to you, however in most cases, you deal with it by taking revenge from the world in a certain way. This act is totally based on emotion, which will absolutely take a bad effect on your personality, and by bad I mean it will turn you into a weaker, immature person. Now where exactly is the problem ? As i see it, this situation is a result of ignorance, the ignorance of how to live with people. Furthermore, the moment you start to know how to live with yourself, you will develop the ability to live with others.