The moral of the story about Ruan Ji visiting Sun Deng is the ineffability of the Dao ( as explained in the opening of the Daodejing ) .
Sun Deng preferred supernatural whistling over traditional master - disciple dialog .
The moral of the story about Ruan Ji visiting Sun Deng , who preferred supernatural whistling over traditional master - disciple dialog , is the ineffability of the Dao ( as explained in the opening of the Daodejing ) .