Who are we? That is first question. It is a question almost impossible to answer. But we all agree that the busy self occupied with our daily activities is not quite the real self. We are quite sure we have lost something in the mere pursuit of living. When we watch a person running about looking for something in a field, the wise man can set a puzzle for all the spectators to solve: what has that person lost? Someone thinks it is a watch; another thinks it is a diamond brooch; and others will essay other guesses. After all the guesses have failed, the wise man who really doesnt know what the person is seeking after, tells the company: 'Ill tell you. He has lost some bream.' And no one can deny that he is right. So we often forget our true self in pursuit of a living, like a bird forgetting its own danger in pursuit of a mantis, which again forgets its own danger in pursuit of another prey, as is expressed in a parable by Chuangtse.