Kâu was a principality in the western portion of the Shang kingdom, associated with a ruling house distinguished for its ability and virtue. Its significance in the book lies in the setting it provides for King Wen’s interpretation of the hexagrams: amid dynastic disorder and his own imprisonment, he is presented as turning a divinatory practice toward reasoned reflection on government and human conduct.

Setting and Political Circumstances

The book places Kâu in the west of the kingdom, in a region corresponding to part of what is now Shaanxi. Its lords had long been noted for ability and virtue, and its chief, King Wen, had become a kind of viceroy over a large part of the realm. He was described as distinguished in both peace and war, and as exercising wisdom and self-restraint.

That reputation stood in sharp contrast to the condition of the Shang state. A brother of the reigning monarch described a country where rulers had squandered their founder’s virtue through drunkenness, the people committed robberies and treachery, officials violated the laws, and criminals could not reliably be apprehended. The account compared the dynasty’s decline to a person attempting to cross a great stream without finding either ford or bank. The book attributes much of this disorder to the monarch’s character and tyranny.

Although princes and people would, the account says, have welcomed King Wen leading an attack against the tyrant, he held back rather than risk being accused of disloyalty. The ruler’s suspicions were eventually aroused, and King Wen was imprisoned in 1143 BCE, with the order for his death liable to arrive at any moment. Kâu’s position was therefore not merely a matter of regional distinction: its ruler’s moral standing had become politically dangerous under a failing regime.

King Wen’s Study in Prison

The book locates King Wen’s work on the hexagrams in his incarceration at Youli. Divination by trigrams was already established, and the use of stalks and tortoise shells as means of examining doubts was described in ancient texts. King Wen would have known divination as a practice of his country. The author speculates that study of the figures might also have seemed innocuous to his captors, who could have dismissed the lines and appended sentences as harmless occupation.

In the author’s evocative reconstruction, King Wen had all sixty-four figures arranged before him. He connected each with qualities of nature, principles of society, or actual and possible conditions of the kingdom, gave it a name expressing the idea he associated with it, and stated that idea in language of exhortation or warning. This account presents his work as an effort to put limits on the follies of divination by bringing the figures into the service of reason. The reconstruction is explicitly the author’s interpretation, not a surviving description of a prison scene.

The book assigns King Wen sixty-four short passages, one for each hexagram, while the Duke of Zhou later supplied symbolic interpretations of the individual lines. King Wen’s statements about each figure as a whole are understood to harmonize with the combined meanings of its six lines. The two layers retain the style of divination, but the account distinguishes their interpretive function from the later use of the passages as oracles for deciding whether to pursue or abandon a contemplated course.

Kâu’s Political Meaning in the Text

The hexagram essays are characterized as short, symbolic treatments of mainly moral, social, and political subjects. Their enigmatic form belongs, in the book’s account, to the inherited manner of diviners; it does not require the conclusion that their only purpose was fortune-telling. The author argues that King Wen and his son wrote in that manner while giving the figures significance rooted in human affairs and the conditions of rule.

This political reading is made especially concrete through the image of dense clouds that do not yield rain. The author interprets the image in relation to Kâu’s western territory: rain nourishes plants, just as good training and government bring blessings, yet those blessings remain restrained and do not spread through the kingdom. The passage thus suggests a contrast between the potential of Kâu’s ruling house and the condition of the larger realm. The author notes that the political implication is less explicit in the text itself than in a later commentator’s interpretation.

Kâu consequently serves as more than the geographical home of a ruling family. Its principality represents a source of potential good government within a disordered kingdom, while the hexagrams provide a symbolic language for considering that contrast. The book’s historical and interpretive account keeps the political inference distinct from the text’s surface wording, presenting it as a reading of how imagery, place, and the circumstances of King Wen’s authorship may converge.