Wên Chih replied by asking Lung Shu to stand with his back to the light, while he himself faced the light and looked at him intently. 'Ah!' said he after a while, 'I see that a good square inch of your heart is hollow. You are within an ace of being a true sage. Six of the orifices in your heart are open and clear, and only the seventh is blocked up. This, however, is doubtless due to the fact that you are mistaking for a disease that which is really divine enlightenment. It is a case in which my shallow art is of no avail.' Pu-tsê, in the Cheng State, was rich in wise men, and Tung-li in men of administrative talent. Among the vassals of Pu-tsê was a certain Po Fêng Tzŭ, who happened to travel through Tung-li and had a meeting with Têng Hsi. The latter cast a glance at his followers, and asked them, with a smile: 'Would you like to see me have some sport with this stranger?' They understood what he would be at, and assented. Têng Hsi then turned to Po Fêng Tzŭ. 'Are you acquainted with the true theory of Sustentation?' he inquired. 'To receive sustenance from others, through inability to support oneself, places one in the category of dogs and swine. It is man's prerogative to give sustenance to other creatures, and to use them for his own purposes. That you and your fellows are provided with abundant food and comfortable clothing is due to us administrators. Young and old, you herd together, and are penned up like cattle destined for the shambles: in what respect are you to be distinguished from dogs and swine?'