The lines
Nine at the beginning [yang at bottom] means:
The marrying maiden as a concubine.
A lame man who\'s able to tread.
Undertakings bring good fortune.
The princess of ancient China maintained a fixed order of rank among the court ladies, who were subordinated to the queen as are younger sisters to the eldest. Frequently they came from the family of the queen, who herself led them to her husband.
The meaning is that a girl entering a family with the consent of the wife will not rank outwardly as the equal of the latter but will withdraw modestly into the background. However, if she understands how to fit herself into the pattern of things, her position will be entirely satisfactory, and she will feel sheltered in the love of the husband to whom she bears children.
The same meaning is brought out in the relationships between officials. A man may enjoy the personal friendship of a prince and be taken into his confidence. Outwardly this man must keep tactfully in the background behind the official ministers of state, but, although he is hampered by this status, as if he were lame, he can nevertheless accomplish something through the kindliness of his nature.
Nine in the second place means:
A one-eyed man who\'s able to see.
The perseverance of a solitary man furthers.
Here the situation is that of a girl married to a man who has disappointed her. Man and wife ought to work together like a pair of eyes. Here the girl is left behind in loneliness; the man of her choice either has become unfaithful or has died. But she does not lose the inner light of loyalty. Though the other eye is gone, she maintains her loyalty even in loneliness.
Six in the third place means:
The marrying maiden as a slave.
She marries as a concubine.
A girl who\'s in a lowly position and finds no husband may, in some circumstances, still win shelter as a concubine.
This pictures the situation of a person who longs too much for joys that cannot be obtained in the usual way. He enters on a situation not altogether compatible with self-esteem. Neither judgement nor warning is added to this line; it merely lays bare the actual situation, so that everyone may draw a lesson from it.