and they live with thinking how to hurt those who hurt them, to live like that is really horrible, those people are never happy ...
When I was writing this post I thought of someone in particular; now, reading your comment, that person came to my mind yet again! She is a wonderful woman and has done many good things in life. However, over the past 20 years she has lived resenting and angry with her ex-husband. She is just stuck in there and often blames him for her unhappiness.
She has consecutively failed to realize that she can be happy once again. Because like you said 'everything is inside us'!
All the best to you always :)