line positions and correspondence in the I Ching

The line positions and correspondence in the I Ching form an interpretive system linking the pattern of whole and divided lines to a hexagram’s subject and to relations of authority and cooperation. The rules do not treat any line as meaningful in isolation: its quality, place, and relation to other lines help determine how it contributes to the whole figure.

Line qualities and proper places

A hexagram consists of six lines, whole or divided. In the positional scheme described by the translator, the first, third, and fifth places are properly occupied by whole lines, while the second, fourth, and sixth are properly occupied by divided lines. Whole lines are associated with strength and hardness, divided lines with weakness and softness. The corresponding political imagery assigns command to the strong and obedience to the weak.

This account makes correctness a matter of fit between a line’s quality and its place. A line’s position therefore does more than provide an address in the figure: it helps establish whether the force represented there accords with the role associated with that place.

Correspondence across the trigrams

The six places are also paired across the two trigrams that compose a hexagram: the first corresponds with the fourth, the second with the fifth, and the third with the sixth. Each pair links a lower-trigram place with its counterpart in the upper trigram. For a correspondence to be complete, the paired lines should differ in quality, one whole and the other divided.

The rule makes the pattern relational. The meaning of a line can be modified by the line opposite it, and the shape of a hexagram can thus express not just a collection of separate positions but a set of possible connections among them.

The central places and political roles

The second and fifth positions, the middle places of the lower and upper trigrams, have special value. When the fifth position holds a whole line and the second a divided line, or the reverse, their correspondence is complete. The translator illustrates the political force of this pairing through a relation between ruler and subordinate: the subject of the fifth place may be a sovereign or commander-in-chief, while the subject of the second may be an able minister or skilled officer. Their mutual action is presented as capable of producing a beneficial and successful result.

Position alone, however, does not settle a line’s meaning. The name of the hexagram and the condition it represents must also be understood; only then can the significance of its lines be applied appropriately. The same positional pattern can therefore serve different interpretations in different hexagrams.

Reading the figure as a whole

In the translator’s account, interpretation moves between the complete hexagram and its individual lines. The hexagram’s theme supplies the context for judging what each place signifies, while the combined meanings of the six lines can, in turn, support the interpretation of the whole figure. This approach is evident in the account of the hexagram named Hosts: its undivided line in the central place of the lower trigram is treated as the leader, with the other lines expected to follow or obey him. The example shows how a positional rule becomes a reading of political organization rather than a bare description of line form.

The system is consequently a method of structured interpretation, not a mechanical key that yields one meaning from line position alone. Its application depends on line quality, proper place, correspondence, centrality, and the hexagram’s subject. The translator presents these rules as the necessary procedure for explaining how the figures and their lines are made to bear moral, social, and political significance.