Yijing hexagram line-position rules

Yijing hexagram line-position rules are a system for reading how the qualities and locations of six whole or divided lines shape a hexagram’s meaning. They make interpretation relational rather than purely literal: a line’s force depends on whether its position suits it, how it corresponds to another line, and what role the hexagram as a whole represents.

Line qualities and proper positions

A hexagram is composed of six lines, arranged as two trigrams. Whole lines signify Yang and are characterized as strong or hard; divided lines signify Yin and are characterized as weak or soft. The text associates the Yang lines with vigour and authority, and the Yin lines with feebleness and submission, describing the former as fit to command and the latter to obey. These qualities are not, by themselves, a complete interpretation: they form part of a pattern whose meaning also depends on placement and context.

The positions have a conventional standard of correctness. The first, third, and fifth places are considered correct for whole lines, while the second, fourth, and sixth are considered correct for divided lines. This standard lets an interpreter ask whether a line’s quality accords with its place. A line’s strength or weakness therefore cannot be read apart from where it stands in the six-line figure.

Correspondence and central places

The rules also pair positions across the two trigrams: the first corresponds to the fourth, the second to the fifth, and the third to the sixth. For a correspondence to be complete, its two lines should have different qualities, one whole and the other divided. Correspondence thus depends on contrast, not simple likeness, and adds another relation to the assessment of a line’s position.

The second and fifth places—the middle lines of the lower and upper trigrams—have particular force. When a whole line in the fifth place meets a divided line in the second, or the reverse, their correspondence is complete. The book illustrates the possible political significance of this arrangement: if the fifth line represents a sovereign or commander, the second may represent a capable minister or skilled officer, and their mutual action can be beneficial and successful. The roles are not fixed independently of interpretation; the name and subject of the hexagram help determine who the lines represent.

Reading lines through the whole hexagram

These positional rules operate within an interpretation of the whole figure. In the account of the sixty-four hexagrams, each receives a short essay, and its separate lines receive their own symbolic explanations. The interpretation of the whole hexagram is presented as harmonious with the combined significance of its six lines. The line rules help explain how that combination is read, but they do not turn each position into a universal character: the significance of a line varies with the hexagram’s name and the situation it denotes.

The example of the hexagram named Hosts shows how position can support an account of authority and responsibility. Its one whole line lies in the central place of the lower trigram, described as the most important place there after the fifth. The interpretation treats its subject as leader of the host, while the other lines are expected to follow or obey. A divided fifth line, by contrast, is read as the chief authority that entrusts the execution of judgment to the commander-in-chief; allowing younger men to share that authority is associated with an adverse outcome. At the top, the line text assigns the ruler’s appointments to those who have distinguished themselves and warns against employing unworthy men in high positions. The example connects line structure to military command, legitimate authority, and the selection of officials.

Interpretation and limits

The rules offer a method for moving from visible line patterns to political, moral, and social meanings, but their application requires judgment. The interpreter must first understand what state or subject the hexagram denotes; only then can the roles and significance of its lines be specified. The same position can consequently carry different applications in different hexagrams, even though the formal relations among the six places remain available for comparison.

The translator’s account of interpretation further distinguishes a line’s symbols from the meaning a reader reconstructs through them. He argues that a literal rendering cannot adequately convey the classical Chinese text: the translator must bring the symbolic writing into relation with the author’s thought and express that meaning as accurately and concisely as possible, sometimes supplying words that the original leaves implicit. This is not presented as unrestricted license. It is a way to make the relation between line, position, and hexagram intelligible while acknowledging that the interpreter’s explanation is not simply a word-for-word transfer.

The method is also set against later philosophical elaboration. In discussing the Great Treatise, the translator rejects the assumption that its language about Yin and Yang already contains a fully developed doctrine of primordial matter, which he says emerged much later. He treats the text’s subject instead as changing phenomena in nature and experience. That caution clarifies the scope of the line-position rules: they are an interpretive framework for the figures and their changing significance, not sufficient evidence on their own for every later cosmological theory built around them.