Law of action or Karma is perhaps the most important law of the mind. Although it looks plain, simple and obvious, it has roots that go very deep. This law determines how a mind works and how it acts. It is also the backbone of the reality. Study of this law answers many fundamental questions related to human existence, such as - why am I the way I am? What am I doing here in this world, what is the purpose or point of it? Why should I act and how should I act? What are the consequences of my actions and how to act so that I get desired consequences?