Are men exceedingly joyful? - they will do damage to the yang element. Are men exceedingly angry? - they will do damage to the yin. And when both yang and yin are damaged, the four seasons will not come as they should, heat and cold will fail to achieve their proper harmony, and this in turn will do harm to the bodies of men. It will make men lose a proper sense of joy and anger, to be constantly shifting from place to place, to think up schemes that gain nothing, to set out on roads that reach no glorious conclusion. Then for the first time the world grows restless and aspiring, and soon afterward appear the ways of Robber Chih, Tseng, and Shih.Go here to read the introductory post to the chapters of the Book of Chuang Tzu.
Then, although the whole world joins in rewarding good men, there will never be enough reward; though the whole world joins in punishing evil men, there will never be enough punishment.
Huge as the world is, it cannot supply sufficient reward or punishment. From the Three Dynasties on down, there has been nothing but bustle and fuss, all over this matter of rewards and punishments. How could people have any leisure to rest in the true form of their inborn nature and fate!
~ Burton Watson translation via Terebess Asia Online ~