The Kabbalah teaches, the hardest sin to recover from is anger, for not only is anger justified in our mind, but even worse, as when we are angry, our soul departs and our entire life force becomes a demon (kelipos) and to uproot this demon we need to make a resolution which is as strong as it is real, which is as permanent as it is solid, which is as firm and is it true, “I will never allow the demon of anger to control me!”