Starting in the Brain
The brain is the control center for our entire body. It controls every cell, every organ, every tissue and the entire autonomic nervous system (composed of the sympathetic and parasympathetic nervous systems) as well as reactions to stress and behaviors. The three-pound mass between our ears is the most complex system in the world. Yet, the brain is as strong as it is complex and fragile. For the brain to work well, it needs to be in a balanced state. In such a state, neither the sympathetic nervous system, nor the parasympathetic nervous system dominates.
The left and right hemispheres of the brain function in tandem. The various lobes on each side of the brain are intended to be naturally balanced and the activities within them are in intended to be in harmony.