One thing common to all is facing sickness. Everyone encounters sickness in their lifetime. Some handle it quietly with dignity. Others grieved that somehow, they are falling prey to illness. Such behavior demonstrates lack of understanding. Body not good listener, grows old and frail despite pleas of desperation. It becomes sickly despite our efforts. Sometimes, affairs out of our control. If we can come to terms with sickness, we can maintain peaceful equilibrium. Opposite of yin of good health is yang of illness. These two are connected by same thread that runs throughout Dao.