Anger that arises from arrogance is not uncommon. We see it daily on our roads and freeways. It is human nature to make mistakes; yet when someone accidently comes early into our lanes, anger quickly arises. We do not even know the other driver. He or she may be an elderly person, or an inexperienced driver. Some people may even honk excessively, making the situation more volatile.
How about that driver that violates your space by dangerously tailgating behind your car. Again anger arises from arrogance. Both parties presume that they have been inconvenienced by the actions of the other. Yet he or she may not know all the information to make that decision. It is because of this arrogance that anger arises.
In the Osashizu it is states that when anger arises, we must calm our minds, and settle it in our hearts. What does this mean? When anger arises we must suppress the emotion by realizing that it may be our arrogance, and not the actions of others that may be causing our anger. I believe it is our heart (soul) that can sweep away our arrogance.