In this material world, every living entity desires some future happiness, which is exactly like a mirage in the desert. Where is water in the desert, or, in other words, where is happiness in this material world? As for this body, what is its value? It is merely a source of various diseases. The so-called philosophers, scientists and politicians know this very well, but nonetheless they aspire for temporary happiness. Happiness is very difficult to obtain, but because they are unable to control their senses, they run after the so-called happiness of the material world and never come to the right conclusion.