He that is soon angry dealeth foolishly: and a man of wicked devices is hated.
– Proverbs 14:17
This proverb gives two types of foolish anger. Being soon angry is what we call hot or quick-tempered. It applies to a man who is quick to react in anger and doesn’t have appropriate self-control (Proverbs 14:29; 16:32). His lack of control of his temper causes him to deal foolishly. He speaks and acts rashly and foolishly in the heat of anger, whereas a calmer head can see the situation better (Proverbs 14:29). The second is a man of wicked devices. This describes one who plots and contrives (Proverbs 6:18; 12:2). We call this a cool or cold anger, which may plot elaborate schemes of revenge. Such a person is hated and seen as more loathsome.