As energy transfers from
One entity to other
The first entity becomes empty at a point,
Even the sun is not an infinite source of energy.
To maintain this cycle of of tranfer of energy the first entity must be given energy in one or other form to make a complete cycle.
In simple words its always give and take..
Human greed of take and only take have made disasters for themselves and the other !
One must practice the art of giving.
-