Sri Aurobindo
Letters of Sri Aurobindo
Volume IV - Part 2
You must remember that anger creates an atmosphere which 
spreads and gets hold of those around. If you give free vent to your anger, that spirit catches hold of others who are open to it like X and makes them also angry and violent. X’s conduct has been serious, but the best way is to show your superiority to him by mastering your own anger. Going outside won’t cure this weakness of yours. You must conquer it here in yourself – otherwise it will go wherever you go and create trouble for you.