When he plays the market, he is practicing Zen, and in turn, the market reveals to him deeper beauties of Zen. This self-poison by our own anger has been warned against by the ancient philosophers. These warnings against anger have come ringing down through the centuries since the first recorded wisdom. Now the self-poison of anger has been scientifically documented by the research of modern psychology. Modern psychology would add that, while the anger often is openly and vehemently expressed, the repentance, which follows, is usually repressed and festers in various forms of self-guilt in our subconscious.
Anger hurts the one who is possessed by it more than the one against whom it is directed.
And so it does because anger is self-poison. But let us not overlook the certainity that our anger also hurts others. And, in hurting others, makes them our enemies and arouses their anger against us. And modern psychiatrists will assure you that the resulting self-sorrow will last for much longer than a day. Anger is like a storm at sea.