Law Of Conservation

"Life is really simple, but we insist on making it complicated." ~Confucius.

Life and this world they have a nature to follow simple and symmetrical laws.All the great discoveries and all the inventions were result of a simple concept in the background.

Most of the laws that are valid in physics chemistry also find application in zoology and botany.The other day I was sitting at the backyard of my house and suddenly a thought tickled my mind.The thought which made me felt excited was whether the world follow law of conservation in almost all domain of life.

The question that created a thud in my mind ,was that does the total amount of happiness in the world is constant i.e. if a person is sad then he can be happy only at the cost of someone others happiness?? so we are happy by making someone cry, these thought are very wired, but i think that there should be some logic behind this.