An innocent boy asked his mother: Always I found you cool with smiling face. I never find you angry, even I break the things or waste. How could you manage this..? Be always cool my love. It will strengthen your heart. And it will improve you in will power and patience. I didn't understand. Boy said. Ok, I'll explain you that. Have you observed, when I boil eggs for you, all the dirts come up at the top. Yes, mom. The boy replied. Now see the cool water in this jar. It's clean mom, but in the bottom, I see some particles of dust. Boy objected. Yes, your observation is correct. Evey person is like this water, having some evil inside. When he boils in his nature those dirts come up by his utterance. ALWAYS BE COOL.