I Ching

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The I Ching, or Book of Changes (Yijing), is the oldest of the Chinese classics: a divination manual built around sixty-four hexagrams, each a stack of six broken or unbroken lines, to which short oracular texts are attached. The hexagrams are generated by a procedure of chance — anciently the sorting of yarrow stalks, later the tossing of three coins — and the result is read as a figure of the moment, a diagnosis of how a situation stands and where it is tending. The Chinese title turns on a single idea: yi, change. The book’s subject is not fixed fortune but the patterns by which one circumstance gives way to the next.

The architecture of the figures

The smallest unit is the line, yao: either unbroken, the firm and active quality the tradition calls yang, or broken, the yielding and receptive quality called yin. Three lines stacked make a trigram, and the eight trigrams — Qian the creative, Kun the receptive, and the six that lie between, named for heaven, earth, thunder, water, fire, mountain, wind, and lake — form the alphabet of the system. Stack two trigrams and the combinations close at sixty-four, the full count of what six binary lines can say. Each of the sixty-four hexagrams carries a name, a terse hexagram statement read as the judgment of the whole figure, and six line statements read line by line from the bottom up. Some lines, in the act of consultation, are marked as moving — changing into their opposite — so that one hexagram turns into a second, and the oracle speaks not only of a state but of its transformation. The architecture is therefore double: a static lattice of figures, and a dynamic web of passages between them. To read the Changes is to locate a moment within that lattice and watch where its lines are carrying it.

The method that builds a hexagram from chance belongs to milfoil divination — the manipulation of a bundle of dried yarrow stalks, shi, whose counting operations yield the numbers from which the lines are drawn. This was the practice of the early diviners, and it stood beside an older art still: the Shang and early Zhou habit of applying heat to turtle plastrons and ox shoulder-blades and reading the future in the cracks, the practice that has left the oracle-bone inscriptions. The yarrow oracle was the more portable and the more durable of the two, and it is the one the Changes preserves. The later substitution of three tossed coins for the stalks shortened the procedure without altering its logic: in both, an unforced fall of objects is taken as a true reading of the moment, and the figure it builds is held to answer the question put to it.

The stratified text

Its core is old and its growth is long. The earliest stratum, the Zhou Yi — the Changes of the Zhou — took shape in the early centuries of the Zhou dynasty, in the first millennium BCE. The American sinologist Edward L. Shaughnessy, comparing the diction of the hexagram and line statements with dated bronze inscriptions, placed the compilation of this nucleus in the last quarter of the ninth century BCE, though ranges from the tenth to the fourth century circulate in the literature. The archaic core is laconic and concrete: omens of weather and harvest, marriages and journeys, captives and campaigns, with little of the moral and metaphysical weight later readers would find in it. Tradition credits the legendary sage-king Fu Xi with the trigrams, drawn from his observation of the patterns of heaven and earth; King Wen of Zhou with the hexagram statements, composed while imprisoned by the last Shang king; and the Duke of Zhou with the line statements — attributions that scholarship treats as the tradition’s account of itself rather than as history. The combinatorial elegance of the sixty-four was real long before any of these names attached to it.

Around this nucleus accreted a body of commentary known as the Ten Wings, Shi Yi, which philosophy gradually folded into the work itself. The Wings are seven texts, three of them counted in two halves to reach the number ten: the Tuan on the hexagram judgments; the Xiang or Image commentary, which reads each figure for the conduct it recommends to the junzi, the noble person; the Wenyan on the first two hexagrams; the Shuogua, which catalogs the correlations of each trigram with a direction, a season, a family role, a body part, an animal; the Xugua and Zagua on the sequence of the figures; and, above all, the Xici or Great Treatise, the philosophical heart of the whole. It is the Xici that supplies the cosmogony every later school would quote — the Supreme Polarity, taiji, generating the two modes, the two modes the four images, the four images the eight trigrams — and that frames the hexagrams as a working model of the world’s process rather than a list of verdicts. These wings, long ascribed to Confucius, are dated by modern study across the late Warring States and the early Han: the Stanford Encyclopedia of Philosophy, in Tze-ki Hon’s account, places the seven texts between the fifth and second centuries BCE and the Xici specifically in the third to second, observing that before the Great Treatise the Yijing was read mostly as a book of oracles. Doubt about the Confucian authorship is itself old: the Song scholar Ouyang Xiu voiced it in the eleventh century. The grafting of the Wings turned a diviner’s handbook into a cosmological text, and the joining of the two strata under the name Yijing, “Classic of Changes,” was sealed in 136 BCE, when Emperor Wu of the Han named it first among the classics and established imperial chairs for its study — the act that guaranteed two millennia of unbroken scrutiny.

Oracle and classic, image and meaning

That double character has held ever since. To some readers the Yijing is an oracle, consulted before a decision; to others a wisdom-book whose images repay study apart from any throw of the stalks. Confucian, Daoist, and later Neo-Confucian thinkers all claimed it. Within the discipline of yixue, the study of the Changes, the long quarrel runs between two ways of reading. The image-and-number school, xiangshu, reads through the figures themselves — their constituent and nested trigrams, the transformations of their lines, their numerical values and their correlations with the calendar and the five phases. It is the older approach, nearer the text’s divinatory roots, and it flourished under the Han with cosmologists such as Meng Xi, who mapped the hexagrams onto the solar terms of the year, and Jing Fang, who arranged the sixty-four into eight palaces and matched their lines to the heavenly stems and earthly branches. This same apparatus fed the Daoist alchemical tradition: the Cantong qi, the foundation text of inner alchemy, borrows the waxing-and-waning hexagrams and the najia correlations to chart the work of the elixir, and the Changes travels in the Daoist canon as readily as in the Confucian, standing beside the Tao Te Ching as a second pole of Chinese wisdom that the Daoists read for the rhythm of the way.

The counter-current is the meaning-and-principle school, yili, which sets the machinery of figures aside and reads the written text for its ethical and metaphysical sense. Its decisive figure is Wang Bi in the third century, whose commentary swept away the Han image-number cosmology in the name of a single principle: the image exists for the sake of the meaning, and once the meaning is secured the image may be let go — a formula he adapted from the Zhuangzi’s parable of the fish-trap forgotten once the fish is caught. The Tang state canonized Wang Bi’s reading; the Song revived both schools at once and carried the image-and-number tradition to a cosmological summit. The diagrams came in through the Daoist adept Chen Tuan and passed to the Song Neo-Confucians, where Shao Yong built the Changes into a complete numerical cosmology, generating the sixty-four hexagrams by repeated doubling and arranging them in the circular and square diagrams that later caught the eye of Europe. Under the Song the commentary on the Yijing became a central arena of philosophical work, the hexagrams pressed into service as a map of cosmic and moral order.

The synthesis was the work of Zhu Xi, who judged that both schools had gone wrong by forgetting what the book was for. He insisted that the Yijing was, in its origin, a divination text, and that its sense could be reached only by treating it as one — the graphic figures as weighty as the words. His Original Meaning of the Zhou Changes pulled the basic text back apart from the Wings that Wang Bi and Cheng Yi had folded into it, and his introductory study set out the diagrammatic and divinatory methods within a frame of moral self-cultivation. Embedded in the civil-examination curriculum, Zhu Xi’s reading became the orthodoxy of the late empire. Yet the tradition remained capable of turning a critical eye on itself: the river-chart and Luo-writing diagrams (Hetu and Luoshu) that Song cosmology traced to high antiquity were shown by the Qing evidential scholars — Huang Zongxi, Mao Qiling, and above all Hu Wei in his Clarification of the Diagrams of 1706 — to be of Song manufacture, drawn from Daoist alchemical sources and read back into the ancient text. The book absorbed each reading without being exhausted by any, and corrected some of them from within.

The Western career

Its passage westward is more recent. Jesuit missionaries in China reported on the Changes from the seventeenth century, and one of them, Joachim Bouvet, sent Gottfried Wilhelm Leibniz a diagram of the hexagrams in their Fu Xi order from Peking in 1701. Leibniz, who had already worked out his binary arithmetic, recognized the sixty-four figures as the numbers nought to sixty-three written in base two — the broken line a zero, the unbroken a one — and published the correspondence in 1703 in the memoirs of the Paris Academy of Sciences, taking the ancient figures as proof that his arithmetic answered to something deep in the order of things. James Legge produced the first scholarly English version in 1882 for the Sacred Books of the East. But the translation that carried the book into wide circulation was Richard Wilhelm’s German rendering of 1924, made with the Chinese scholar Lao Naixuan and accompanied by Wilhelm’s own running commentary in the manner of the tradition. Cary F. Baynes Englished it in 1950, and for that edition Carl Jung supplied a foreword arguing that the oracle worked not by causation but by what he named synchronicity — a meaningful coincidence between the inner question and the outer fall of the lines. Jung’s framing is his own interpretation, not a claim the text makes for itself; it reached Western readers in part through the Eranos circle, where Wilhelm had lectured and where Jung was a fixture, and it shaped how a century of Western readers approached the book — as a psychological mirror as much as an oracle. Through all of this the Changes kept its standing at home as well: across China, Korea, Japan, and Vietnam its trigrams diffused into almanac and geomantic popular religion, its numerical cosmology into medicine and statecraft, its figures into the common furniture of thought.

Texts, manuscripts, and scholarship

The critical study of the Changes now rests on a stratified picture the tradition itself did not draw, and on manuscripts the great translators never saw. In December 1973 a silk copy of the Zhou Yi was excavated from a tomb at Mawangdui sealed in 168 BCE and written out around 175 BCE — the oldest substantial witness to the text, presenting the hexagrams in an order entirely different from the received one and accompanied by a version of the Xici together with commentaries no one had known existed, among them the dialogues since titled The Two or Three Disciples Ask and Essentials (Mawangdui Silk Texts). The bamboo Zhou Yi acquired by the Shanghai Museum shows the book already in broad use by about 300 BCE. None of this had reached the desks of Legge, Wilhelm, or the nineteenth-century French translators Philastre and de Harlez, who worked from the received recension alone. The standard English scholarly gateways today are Richard John Lynn’s The Classic of Changes (Columbia, 1994), which renders the text through Wang Bi’s commentary, and Edward L. Shaughnessy’s I Ching: The Classic of Changes (Ballantine, 1996), a translation of the Mawangdui manuscript. Richard J. Smith’s The I Ching: A Biography (Princeton, 2012) traces the book’s two-thousand-year career and its global spread, and his Fathoming the Cosmos and Ordering the World (Virginia, 2008) reconstructs the xiangshu–yili contest in full. Tze-ki Hon’s survey of the philosophy of change anchors the academic dating of the strata. The public-domain spine remains hostable in full: Legge’s Yî King of 1882, Wilhelm’s German I Ging of 1924, and Philastre’s Le Yi king with its complete Cheng Yi and Zhu Xi commentary.

Sixty-four figures, and the spaces between them: that is all the book offers, and it is enough. The Han cosmologist who fit the hexagrams to the turning year, the Song philosopher who read them as the structure of principle, the Daoist who borrowed them for the elixir, the Jesuit who saw binary numbers in them, the analyst who heard an answer in the fall of the coins — each took from the same austere lattice a different and complete world. The Changes is built to be read that way. A figure is not a verdict but a position, and every position, by the book’s own first principle, is already on its way to the next.

→ In the library: Legge — The Texts of Tâoism (SBE 39 & 40, 1891)

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