There is an old story about the Buddha and an angry old man which goes something like this.
Each day the Buddha would go to the market and each day, an angry old man would come up to him and start hurling insults and abuse at him. Each day, the Buddha continues smiling and minding his own business.
After a week, the old man is so curious about why the Buddha doesn’t react, he has to ask him why he continues to smile despite all the abuse. The Buddha replies:
Buddha, with the same smile still on his face looks at the old man and asks “If I were to bring you a gift tomorrow morning all wrapped up in a beautiful box would you accept it?” to which the old man replies “Absolutely not, I would take nothing from the likes of you!”. “Ah ha” the Buddha replies “Well if I were to offer you this gift and you were to refuse then who would this gift belong to?”. “It would still belong to you of course” answers the old man. “And so the same goes with your anger, when I choose not to accept your gift of anger , does it not then remain your own?”