If Xián has appeared in your reading, the book is naming a configuration of mutual influence. The lower trigram is Mountain — the stable, receiving form; the upper is Lake — the moving, communicative one. The hexagram opens the second book of the sequence (hexagrams 31–64), which is concerned, broadly, with human relations rather than cosmological forces.

Classical commentary reads this hexagram as the right shape of attraction. The character itself originally meant to be moved together — the older form of the modern word for feeling. The hexagram appears when two parties are entering a relationship in which both will be changed by the contact. Neither is meant to remain what they were before.

What the book counsels is the receptivity that makes real influence possible. 君子以虛受人 — the noble person receives others with emptiness. The mountain holds the lake because it has made room. The reader is being asked to notice whether they have actually cleared the room for what they are saying they want to be moved by, or whether they have brought their old furniture into the new house.

Xián's failure mode is the attempt to influence without being influenced in return. The book is firm on this. One-directional influence is not Xián; it is a different and lesser configuration. The hexagram appears when the reader is at the start of an exchange that will only work if it is genuinely mutual. The auspicious word in the judgment attaches to that mutuality, not to any other version.