The forces of the body are at war with this occurrence. There is an effort of the cumulative organism to throw out the enemy that has entered the system. Any interference with the system is not tolerated. The human body is a miniature cosmos. A study of the human system can suggest ways leading to the knowledge of what the universe is made of, and conversely, if the universe is known, one also knows one s self.
Man is a microcosm, while the universe is the macrocosm.
This balance, which is the universe, is a perfect equilibrium of being. What is called action, Karma , activity, movement, doing, is a kind of interference with this balance, which is the reason why it sets up a reaction, comparable to the reaction caused by one s own body when a thorn pricks the foot. The thorn coming in contact with the foot is the extraneous action, the activity, or, anything that one does, or anything that anyone does anywhere. The reaction of the organism to this event is the Karma , the nemesis of retribution. The nature of the reaction, its quantity as well as quality, will depend upon the nature and intensity of the interference, even as when an enemy attacks a country, the reaction will depend upon the extent of the invasion.