According to Newton's law of motion, every action has an equal and opposite reaction.  This is a universally acknowledged fact which be applied beyond physics to most any situation.  Newton's law plays a predominant role in our lives through what is known as 'Cause and Effect'.  Our choices often lead us to take the actions that set the wheels of our lives in motion. Our actions are the causes that return to us with results.  Every choice we make and action we take has a consequence. It is important to understand which actions lead to the best results and which actions are affecting our lives in ways we would like to change.