(10-96) A Zen master in Tang dynasty named Hui Zhong wanted to repay his servant who had served him for more than thirty years by helping him to get his enlightenment. One day the master called out to the servant: "Ying Zhen." The servant immediately replied: "Yes, master. What can I do for you." The master sighed and replied: "Nothing."

After a while, the master called out again: "Ying Zhen." The servant replied again: "Yes, master. What can I do for you." Thus the same scene repeated three times. Finally, the master called: "Buddha. Buddha." The servant was confused, and asked: "Master, whom are you calling?" "I am calling you." The master said. "But, master, I am Ying Zhen, not Buddha." the servant said.

The master was disappointed, and said to the servant: "I thought I have let you down. As it turned out, it is you who have let me down."

The servant immediately apologized: "Master, no matter what happened, I will never let you down; and you have certainly never let me down."