If you are kind, the Bible says you help yourself. Friends, this shows there is power in kind and loving words, words of wisdom. David was riding up with 400 armed men. It was words. Words stopped an army.
Words have real power.
Sometimes you may not want to use gentle words. That brings me to the third rule of Biblical wisdom. If you are tempted to use harsh words because you have been insulted, don't. Overlook the insult. But the Bible specifically teaches us to overlook insult.