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" The best single source for Stoic advice on preventing and dealing with anger is Seneca’s essay “On Anger.” Anger, says Seneca, is “brief insanity,” and the damage done by anger is enormous: “No plague has cost the human race more.” Because of anger, he says, we see all around us people being killed, poisoned, and sued; we see cities and nations ruined. And besides destroying cities and nations, anger can destroy us individually. We live in a world, after all, in which there is much to be angry about, meaning that unless we can learn to control our anger, we will be perpetually angry. Being angry, Seneca concludes, is a waste of precious time. "
― William B. Irvine , A Guide to the Good Life: The Ancient Art of Stoic Joy
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" anger is a double-edged sword: besides motivating us, it can exhaust us, so that we run out of energy before winning our battle. Furthermore, the anger we express often triggers anger in those on the other side of an issue. They harden their stance, making compromise less likely. We live in a world in which change, when it comes, is likely to be incremental, meaning that righteous anger can retard progress on the issue in question. And finally, we know that anger can cloud our judgment, causing us to do foolish things and blinding us to possible solutions. "
― William B. Irvine , The Stoic Challenge: A Philosopher's Guide to Becoming Tougher, Calmer, and More Resilient