The worst impediment to peace is anger. An angry person will not have peace with Hashem or with people. His anger causes him to commit sins and fight with people he is in contact with regularly. (ibid.) An angry person will not have peace of mind in this world or in the next world. In this world, he is constantly angry when he sees things he doesn’t agree with, and he is always bitter and complaining. He will derive joy from nothing. In the next world, he will have no rest because he spent his life walking in darkness. About such a person it says, “A man of rage has many sins.” (Ma’aneh Rach,
  
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