Yarrow stalks vs coins i ching

The question is older than it looks. The yarrow-stalk method is the original procedure, documented in the Great Treatise (Ta Chuan) and practiced continuously from the Zhou dynasty onward; the coin method appeared in the Southern Song period (1127–1279 CE) and was popularized by the scholar Shao Yun. Every serious commentary on the oracle eventually has to reckon with the difference between them, because the two methods are not mathematically equivalent — and that asymmetry carries meaning.

The arithmetic of the two methods

Both procedures generate one of four values for each line: 6 (old yin, moving), 7 (young yang, stable), 8 (young yin, stable), or 9 (old yang, moving). The coin method is simple: three coins thrown together, heads counting as yang (value 3) and tails as yin (value 2). Three tails yields 6; three heads yields 9; mixed throws yield 7 or 8. The probabilities are symmetrical — each of the four outcomes has an equal chance of appearing, and the likelihood of a moving line (6 or 9) equals that of a stable line (7 or 8).

The yarrow-stalk procedure is another matter entirely. Fifty stalks are used, one set aside at the outset, and the remaining forty-nine are divided and counted off by fours through three successive operations to produce each line. As Wilhelm and Baynes (1950) explain in the appendix to their translation, the mathematical odds using yarrow stalks are asymmetrical: a yang line is more likely to transform than a yin line, and stable lines are considerably more probable than moving ones. Ritsema and Karcher (1994) put the point directly:

The coin-oracle was popularized in the Southern Sung period (1127–1279) and has been used for several hundred years. It yields quick results. However it has a particular bias, for the mathematical odds involved are symmetrical. The probability that a yin line will transform is equal to that of a yang line, as is the proportion of stable yin and stable yang. This reflects binary choice and does not penetrate as deeply into the situation as the other, older and more complicated way of consulting the Oracle.

The asymmetry in the yarrow-stalk method reflects something the Chinese understood about yin and yang as they actually behave: yin tends toward stability, yang toward transformation. The coin method flattens this qualitative difference into a binary flip.

What the time buys

Huang (1998) notes that manipulating the fifty stalks eighteen times — three operations per line, six lines — takes at least half an hour. This is not inefficiency; it is the point. The repetitive physical rhythm of dividing and counting induces what Huang calls a state in which "the divine and the diviner become closely connected," a condition of sustained attention that the coin method, completed in minutes, cannot replicate. Wilhelm (1950) makes the same observation from a different angle: the manipulation of yarrow stalks "makes it possible for the unconscious in man to become active," and this requires "a clear and tranquil mind, receptive to the cosmic influences hidden in the humble divining stalks."

Jung understood this. Von Franz (1975) records that he used the I Ching for years to obtain responses to difficult situations, eventually giving it up only when he found he already knew the answer before the stalks fell — meaning the meditative preparation had become so complete that the external procedure was no longer necessary as a roundabout route to what the unconscious already held.

The coin method's legitimate place

None of this means coins are fraudulent. Hellmut Wilhelm (1960) describes using the coin method in a live demonstration and obtaining a hexagram — Hsieh, Deliverance (40) — with almost all lines moving, a configuration he reads as indicating a condition requiring release from many kinds of constraint simultaneously. The oracle spoke clearly through coins. The Taoist commentator Liu I-ming (1986) and Cleary's rendering of the same tradition recommend coins straightforwardly for practical consultation. Anthony (1988) builds her entire depth-psychological commentary around coin-throwing, treating the throw as the mechanism by which the Sage replies.

The honest position is this: coins are faster and more accessible; they sacrifice the asymmetric probability structure and the meditative duration that the yarrow-stalk method builds in by design. For occasional consultation or for someone new to the oracle, coins are a reasonable entry point. For sustained practice — for the kind of relationship with the oracle that Jung, Wilhelm, and Huang describe — the stalks reward the time they demand.

I Ching oracle experience — cast a hexagram and receive a reading in Sebastian's voice
Moving lines — what it means when a line transforms and generates a second hexagram
Synchronicity — Jung's acausal principle and why it grounds the oracle's logic
Richard Wilhelm — the translator whose friendship with Jung brought the Yijing into Western depth psychology

Sources Cited

Wilhelm, Richard, and Baynes, Cary F., 1950, The I Ching or Book of Changes
Ritsema, Rudolf, and Karcher, Stephen, 1994, I Ching: The Classic Chinese Oracle of Change
Huang, Alfred, 1998, The Complete I Ching: The Definitive Translation
Wilhelm, Hellmut, 1960, Change: Eight Lectures on the I Ching
Anthony, Carol K., 1988, A Guide to the I Ching
von Franz, Marie-Louise, 1975, C.G. Jung: His Myth in Our Time