宏智禪師廣錄 3.35

3.35

[The Master] cited: The National Teacher called his attendant three times, and the attendant responded three times. The National Teacher said: “I had thought I was letting you down; who would have known that you were letting me down?”
The Master said: “In the way of humaneness and righteousness, on the part of master and disciple, calling again and being able to respond again discourses on reality, not emptiness. And tell me: is there letting down or is there no letting down? Flawless white jade; carving patterns destroys its virtue.”