Nine in the Third Place is at the top of Li, the culmination of brightness; moreover, it is firm and advances. Six at the Top is at the peak of Kun, the extremity of darkness.
Supreme brightness dwells below and forms the head of the lower realm; supreme darkness resides above and occupies the dead-end position. Standing in direct opposition and resonance, brightness is set to eradicate darkness. Does not this meaning reflect the deeds of Tang and Wu?
The south lies ahead, the direction of brightness. Hunting is the act of hunting down and eradicating predators. "Hunting in the south" means advancing forward to eliminate harm.
It will surely capture the great head; "the great head" refers to the ringleader of darkness, Six at the Top. The third and top lines correspond directly, symbolizing supreme brightness overcoming supreme darkness.
"One must not be hasty in perseverance" means that after punishing the chief culprit, old and corrupted habits cannot be transformed all at once; change must proceed gradually. Rushing transformation will induce panic and unrest.
Thus the "Announcement on Alcohol" says: "When Yin's ministers and officials indulged in drink, do not execute them rashly, but instruct them for a time."
Even after a long period, it was still said that remnants of the custom were not yet eradicated; this shows that deep-seated habits cannot be abolished overnight. Hence it says "one must not be hasty in perseverance"—setting things right must not be done with haste.
Though Six at the Top is not in the ruler's position, because it occupies the summit and embodies extreme darkness, it is the master of darkness, called the "great head."