Let us consider the above definition carefully. The main keyword in the definition is "want". The whole trouble starts when we want something. Every moment of our lives we keep on wanting something or the other. If we could make a list of all the things we want in our lives since childhood to death, including trivial as well as very important, all the paper in the world perhaps would not be enough for this purpose. Only a small percentage of all our wishes is fulfilled in spite of all our endeavours. The percentage of wishes, which remain unfulfilled, keeps on growing with time. As a result, as we grow older, we become more and more unhappy. We grow tired of life. The blessings, which our lives and the whole existence keep showering upon us, gradually lose their charm. The frustration, of failing to fulfill most of our wishes, sets in. We start feeling weighed down. The feeling that the whole life is somehow conspiring to keep us unhappy grows. Life becomes full of miseries. We keep stumbling from one failure to another. This is how to achieve happiness.