Are you angry? Be angry at your sins, beat your soul, afflict your conscience, but strict in judgement and a terrible punisher of your own sins. This is the benefit of anger, wherefore God placed it in us. John Chrysostom
Love does not know how to be angry. Isaac the Syrian
It is easy to fly into a passion... anybody can do that, but to be angry with the right person to the right extent and at the right time and in the right way that is not easy. Aristotle
He is a fool who cannot be angry but a wise man who will not. American Proverb
Be angry with a murderer, but keep your compassion for his victim. Latin Proverb
There are two things a person should never be angry at, what they can help, and what they cannot. Traditional Proverb