We should keep our heart cool. We should put pressure on our mind. We should order works to our mind very clearly and very peacefully one after another. Sometimes we may feel like 'i have everything, i can do anything'. And the very next minute we may go into sadness. So in life sadness and happiness are like passing clouds. Our heart and soul are like constant sky. Some of you may be ready to condemn my point. But think once, this is universal. Be happy. Always be constant. Then you can lead your life.