One interesting thing about the text is that it describes the physiological center for the body's energies as being in the center of the chest, not the lower abdomen as in later Daoist works. Very interesting for those with an interest in Akuzawa's excercises . . .
But now back to our chewy center. Apologies to Chris for the thread drift.
Are you reading classical Chinese at that level now, Josh? You told me your Mandarin sucked.
Ryabko's Systema works with the solar plexus as center, too.