Life - Interplay of Energy in million forms
  Everything around you see, watch, feel is the play of energy. Life is the interplay of Light & Dark energy  in physicality. It has to induce polarity for you to see contrast so that there is a desire in you to be better.  You can call light & dark energy as positive energy or negative energy, yin or yang or even you can   call it as Energy-1 & Energy-2. It does not make any difference.   Your body has both positive energy & negative energy. Positivity is the light nature of life-energy which   is the domain of heart. Joy, love, peaceful, being calm, happy is the positive nature of the energy. The   Dark side is Fear, hatred, jealousy, impatience, desperation etc. which is the domain of brain. Basically   they are the high states & low states of life-energy. When you are too much identified with low state of   energy you go into depression . When you are identified with too much of lighter aspects of life-energy   you go into high state...