Being Free From Anger.
Hillel the Sage was able to remain patient even when someone purposely tried to provoke him. He felt no irritation whatsoever about any matter. There was no arousal of anger at all. This is what it means to be completely free from anger.
The level of Hillel is the level we should each strive for as regards to not getting angry. Of course it is not easy. But the first step is to increase your motivation and be totally resolved to conquer anger. Then feel joy with every drop of improvement!