There is evidence of activity (of the self?) but we do not see its physical form. It has reality but no physical form. (1) The hundred bones, the aim external cavities and the six internal organs are all complete in the body. Which part shall I love best? Would you say to love them all? But there is bound to be some preference. Do they all serve as servants of someone else? Since servants cannot govern themselves, do they serve as master and servant by turn? Surely there must be a true ruler who controls them! (2)

(Tchuang Tzu)