When I was watching the documentary 'the making of Elton John', I realised there are two versions of 'the circle of life', and he singed the one which so different with the theme song of the 'the lion king'. -- Some say eat or be eaten Some say live and let live But all are agreed as they join the stampede You should never take more than you give But in the Lion King, you only find two words "despair" and "hope". The ancient Chinese philosopher Wang Ch'ung taught us in his book Lun Hêng about the five elements of the nature, metal, wood, water, fire, and earth, saying: If the metal does not hurt the wood, the wood cannot be used, and if the fire does not melt the metal, the metal cannot be made into a tool. Thus the injury done by one thing to the other turns out to be a benefit after all. Is the cruelty is the origin of universe, hope derives from despair?