It is not too much of a stretch to see how mental models (beliefs), personal mastery (knowing ourselves objectively), team learning (interpersonal effectiveness) and shared vision (sharing our dreams with others) can apply to ourselves as energy systems connected to other energy systems. Every day we each make a choice, either consciously or unconsciously, of the quality of energy we offer ourselves and others; whether or not we will do
the harder thing that day.

William D. Anton, Ph.D.