Yin–Yang Polarity

Yin–Yang Polarity is the I Ching’s account of opposed qualities as forces whose balance changes over time, not as a fixed division between good and evil. In the line figures, the whole line signifies the bright and strong, while the divided line signifies the dark and weak; their shifting arrangement gives form to hexagrams that can describe changing conditions in nature, society, and political life.

The Lines and Their Relations

The hexagrams consist of six whole or divided lines, grouped into two trigrams. The lines’ positions help determine how their meanings work together: the first corresponds with the fourth, the second with the fifth, and the third with the sixth. A correlation is complete when the paired lines have different qualities, one whole and one divided. The middle positions, especially the second and fifth, carry particular force; when they complement one another, the relationship can represent a capable minister supporting a sovereign or commander, with beneficial results.

The lines also express differences in strength and authority. Whole lines indicate strength or hardness, associated with vigor and command; divided lines indicate weakness or softness, associated with submission. Yet the meaning of a line depends on the hexagram’s name and subject, rather than on its quality alone. The same structural opposition can therefore take on different practical meanings in different situations.

Cycles of Decline and Return

The hexagram Return shows polarity unfolding over a calendrical cycle. In Splitting Apart, one strong line stands above five weak lines, as cold and decline approach their height in the ninth month. The tenth-month figure has no strong lines; in the eleventh-month figure Return, a single strong line reappears beneath five weak ones, at the winter solstice, when the sun turns back toward summer. The movement from decline to recovery is thus pictured not as an escape from change but as a turn within it.

The phrase “In seven days comes his return” is explained through a sequence of hexagrams corresponding to the fifth through tenth months. Across those figures, yin lines progressively prevail over yang until the latter disappear; the seventh figure then marks yang beginning to reassert itself. In this account, a day is taken to stand for a month, and the pattern has an analogue in the changing condition of society and the state. Recovery follows an extreme of decline, but the text does not promise an immovable perfect kingdom.

Union, Conflict, and Political Meaning

The polarity can also describe a successful joining of different qualities. In one line commentary, a figure initially sees an opponent as alien and threatening, but, on recognizing a friend, lowers his bow. Their union is compared with rain resulting from the happy union of yang and yin in nature. The image makes reconciliation a consequence of changed recognition: opposition need not be the final condition when the parties’ relation can be brought into accord.

The book’s political readings likewise use line structure to frame questions of authority and collective action. In the Hosts hexagram, the single undivided line in the central position of the lower trigram represents the leader among the divided lines. The commentary treats rightful authority and disciplined command as conditions for successful action. In its reading of the fifth line, it distinguishes the chief authority from the oldest son, who commands the host, and warns against allowing younger men to share that power. Polarity here is not merely a description of abstract forces: position and relation shape who may command and what consequences follow.

Interpretation and Later Philosophy

The translator cautions against reading the terms yin and yang as proof that the Great Treatise already teaches a fully developed doctrine of primordial matter. In his account, the passage concerns changing phenomena in nature and experience; the more elaborate theory of primary matter emerged much later, taking shape in the Confucian school over a thousand years after the I Ching’s composition and becoming fully developed in the Song period. Treating that later cosmology as the passage’s original subject, he argues, puts the later interpretation before the earlier text.

That distinction matters to the book’s method of interpretation. Its hexagram essays and line explanations combine symbols whose significance depends on both the whole figure and the particular position of each line. The translator rejects literal word-for-word rendering as inadequate to Chinese classical writing, describing translation instead as entering into the author’s thought and expressing its meaning as exactly and concisely as possible. Yin–Yang Polarity consequently operates both as a formal feature of the figures and as a flexible language for reading changing relations, while remaining distinct from later philosophical systems imposed upon it.