This is an amazing piece from 'The Godfather' by Mario Puzo. A piece of advice everyone should always remember. One of my favourites.
Though Don Corleone disapproved of his son's foolish display of anger, the tantrum served a purpose. It would convince the interlopers that their presence was unexpected and unprepared for. So Don Corleone himself was not angry. He had long ago learned that the society imposes insults that must be borne, comforted by the knowledge that in this world there comes a time when the most humble of men, if he keeps his eyes open, can take his revenge on the most powerful. It was this knowledge that prevented the Don from losing the humility all his friends admired in him.