We cannot change the past, so any energy devoted to it is wasted. Similarly, fearing the future is wasted energy because the future is not a reality, just a mental projection. In fact, our future plans can only materialize through our present actions.  So, it only makes sense to concentrate our energy on the present moment – alert, conscious and connected with everyone and everything we are experiencing in the present moment. Only the present moment exists.  If we are really present in the here and now, and able to be happy there, the future will bring more of the same. Future is just a present moment, too.