Sometimes you become too much angry, you may even criticize or hit someone. This is a great sin. In fact, when you criticize or hit your enemy, but you are criticizing or hitting God himself. Therefore, you should lead your life in such a way that you do not cause harm to anybody.  It is natural that you do good to those who do good to you. There is nothing very great about it. But Sai asks you to do good even to those who try to harm. You should not pay attention to the harm that they try to do  to you in any manner. You should always remain in a state of supreme peace. You can attain everything if you have peace.

- Divine Discourse, Jan 14, 2009.

Practice to see the hand of God in everything that happens. 
Then you will never exult or grieve over anything. - Baba