The basis of Chinese philosophy is balance attained through a harmonious interaction of opposing elements. This simple principal is represented by a simple circular diagram, divided into half, representing opposite forces.
The dividing line, however, does not cut straight through the circle. It is winding curve, showing that the two sides are not independent of one another, but rather they ‘follow’ and complement each other in an endless circular motion.
As the night must follow the day, and death must occur before birth, the yin-yang symbol reminds us that change is constant, and that peace and harmony in the universe relies on a perfect balance of opposites. Similarly, we should strive to strike a good equilibrium with every aspect of our lives, and avoid excessive indulgence, if we want to be at peace with ourselves.