Yichuan YizhuanLine statement
The various yang lines have been stripped away to exhaustion, and only Nine at the Top remains intact, like a huge fruit that has not been eaten, about to manifest the principle of rebirth. If Nine at the Top were also to transform, it would become pure yin.
Yet yang has no principle of complete extinction; when it transforms above, it generates below, without the slightest interval allowing pause. The Sage elucidated this principle to demonstrate that yang and the Way of the noble person can never be destroyed.
Some ask: If splitting reaches its end it becomes pure The Receptive (Earth), so how could there still be yang?
I reply: Matching the hexagrams to the months, The Receptive corresponds to the tenth month; speaking in terms of the waxing and waning of Qi, yang splits into The Receptive, and when yang returns it becomes Return—yang has never been extinguished.
When it is stripped away to the utmost above, it is reborn below; hence the tenth month is called the 'yang month,' lest people suspect there is no yang. The same is true of yin, though the Sage did not dwell on it.
When the way of yin reaches its peak, its disorder is evident; when disorder reaches its extreme, people naturally long for order, so the hearts of the multitude wish to carry the noble person, and the noble person obtains a carriage.
The poems 'Feifeng' and 'Xiaquan' are placed at the end of the Changed Airs for this very reason. The principle being so, in the hexagram the host of yin honors the yang as an image of carrying it together.
'The petty man splits his shelter'—for the petty man, when splitting reaches its peak, it splits away his hut, leaving him nowhere to lodge his person.
Setting aside whether the line is yin or yang, it simply means that when a petty man faces the extremity of splitting, it reaches his shelter. The shelter is drawn from the image of being at the top.
Some ask: The waning of yin and yang must await exhaustion before being reborn below; why does this line at the top already possess the meaning of rebirth? And why does Six at the Top in Breakthrough (Resoluteness) say 'in the end there is misfortune'?
I reply: Nine at the Top dwells at the extremity of Splitting Apart; having a single yang at the summit, and yang having no principle of complete extinction, its meaning of rebirth is made plain to show that the Way of the noble person cannot perish.
In Breakthrough, yang dispels yin; yin is the way of petty men, so it merely speaks of its extinction. Why would there be any need to mention a principle of its rebirth?