I recall reading this story many years ago when I was a child.  It influenced me on how I responded to situations that aroused anger with another person.  The lessons I learnt were:* Before reacting clarify with the person the reason for their behaviour.  It often happens that we over react to the situation and then regret about it.  Once we know the facts we're in a better position to respond.* Take a pause before reacting and ask if it is worth getting angry, or is the situation a case of someone's Childish Behavior.   If it is, then you can respond like the Imam "I don't get angry at Childish Behaviour".