We've all heard it! We need a bit of yin and a bit of yang. We need harmony between polar opposites. You have to have balance. Good needs evil and evil needs good. Hitler has his place just like Mother Teresa.
According to ancient Chinese philosophy, in the beginning was the Tao, silent, dark and impersonal. But the Tao separated into the two principles, yin and yang, and from the many combinations of yin and yang everything else that is in the world has emerged. Truth be told, the Tao is responsible for wars, famine and terrorists as well as picnics, families and squirrels. The Tao has made it all.
We've all heard it! We need a bit of yin and yang. We desperately need harmony and balance in our world.