Zhouyi BenyiLine statement
Yellow is the central color; the lower garment (skirt) is an adornment worn below. Six in the Fifth Place occupies the honored position with a yin line; its virtues of centrality and compliance are filled within and manifest outwardly.
Therefore its image is like this, and its divination is supreme good fortune. For a diviner whose virtue matches this, the divination will also be like this.
The Zuo Zhuan records that when Nan Kuai was about to rebel, he divined and obtained this line, considering it greatly auspicious. Zifu Huibo said: "For affairs of loyalty and trust, it is permissible; otherwise, defeat is certain.
Being firm without and gentle within is loyalty; harmonizing to lead with uprightness is trust. Therefore it says: 'A yellow lower garment brings supreme good fortune.'
Yellow is the color of the center; the lower garment is the adornment of the lower body; 'supreme' is the chief of goodness.
If the center is not loyal, one does not attain its color; if subordinates are not respectful, they do not attain its adornment; if an affair is not good, it does not attain its culmination. Moreover, the Changes cannot be used to divine perilous undertakings.
If any of these three is lacking, even though the divination matches, it is not auspicious." Later, Nan Kuai was indeed defeated; from this, the method of divination can be seen. Refinement resides in the center and manifests outwardly.