Amma Syncletica, let me hear you say something.

Saint Syncletica

Amma Syncletica said, "It is good not to get angry.  But it it should happen, do not allow your day to go by affected by it.  For it is said, 'Do not let the sun go down on your anger.'.  Otherwise, the rest of your life may be affected by it.  Why hate a person who hurts you, for it is that person who is unjust, but the devil.  Hate the sickness, but not the sick person."