The natural operation involved in all spheres of life where any action that takes place results in a reaction.
The natural law determines the fate of every individual, as we register our own spiritual growth. The choices we make instigate a cause and effect action that cannot be separated. When death occurs, the soul, at the evolution it has attained, starts its new life. It cannot be higher or lower than what it is. The natural law takes cognizance of every factor. Natural law ensures that justice is done. We cannot opt out of the natural law, as it operates irrespective of what we think or do.
Alone, an individual punishes or rewards itself by every act performed. Each person grows, or fails to grow, by his own life.
See also Universal Laws.