“The cook，the boy impersonating the dead，and the officer of prayer—all are content with their duties.Birds，beasts，and all things—all are satisfied with their nature.Yao and Hsu Yu，both are quiet in their own positions.In the world，that is the most real gain.Since every one has his real gain，what is the need of artificial activity？All simply enjoy themselves.Therefore，though the conduct of Yao and Hsü Yu was different，their happiness was the same.” —Kuo Hsiang