Approaching the I Ching, Part 3
C. INSTRUMENTS USED TO FORM A HEXAGRAM
ANCIENT METHODS
The yarrow-stalk method and the coin method are the two methods most commonly used at present in the Western world.
Fifty Yarrow Sticks
The yarrow-stalk oracle became popular about three thousand years ago during the Chou dynasty . In early Chou times, yarrow stalks and tortoise shells were consulted equally by the soothsayers employed by the Chou state, who continued as a class descended from their Shang ancestors until the tortoise shell oracle finally disappeared. The elaborate present-day method of consulting the oracle by manipulation of yarrow stalks was apparently not in use in early Chou times. At first, the yarrow stalk method seems to have been a sort of drawing of lots, in which long stalks meant a positive answer and short stalks a negative. Then, at some period of time when the two fundamental forces were seen to be of equal rank, two short stalks were made to equal one long stalk and, in accord with the still more ancient concept that heaven is one and earth is two, the two stalks were used together to represent the yin force.
Yarrow (Achillea millefolium) stalks were easier to use than animal bones and tortoise shells. The stalk of the yarrow was firm and durable and remained unwithered for a long time. It was tall and straight and could be prepared for use with little manual labor. The ancients came to consider it a divine gift bestowed upon humanity so that men could communicate with heaven. It was natural that yarrow stalks were chosen to be used for oracular purpose in ancient times. At that time yarrow grew wild in the commons that were set apart for sacred rituals. From the time that the commons no longer served this sacred role, it became customary to gather yarrow stalks from some other hallowed place such as the grave of Confucius or Mencius.
According to Chou tradition, people of different social strata received yarrow stalks of different lengths to divine with. According to The Book of Rites of the Chou Dynasty, yarrow stalks of nine chi (one chi equaling approximately one foot) were relegated to the emperor, of seven chi to a duke or prince, of five chi to a high official, and of three chi to a scholar. (No length was relegated to the common people in The Book of Rites.) At that time, divination was a social event, a ritual for seeking harmony between heaven and humans. People gathered to watch the diviner and his attendants. Later, when divination became a personal affair, the yarrow stalks became shorter. Today it is not easy to find fifty yarrow stalks, and people tend to use substitutes they are comfortable with.
Fifty yarrow stalks make the set used for consulting the oracle. One stalk is set aside at the beginning of the procedure and plays no further part. (Exact instructions for consulting the oracle through the yarrow-stalk method are available in nearly every modern English edition of the I Ching. These modern instructions are based on the instructions given in the Great Treatise that is attributed to Confucius, chapter IX.3–6.) Manipulating the stalks three times produces one line. For the six lines of a hexagram, one needs to manipulate the fifty yarrow stalks eighteen times. To obtain a six-line hexagram takes at least half an hour. Most modern commentators suggest that the thirty minutes it takes to consult the oracle using the yarrow-stalk method should be used to meditate, and they consider that the repetitive process of separating, dividing, and counting the yarrow stalks introduces a deeper level of awareness.
According to the specific method of triple counting used in the yarrow-stalk method, the stalks are counted off to obtain the number values 6, 7, 8, or 9 for each of the six lines of a hexagram. It is in this way that the numbers assigned to the lines in a hexagram—6, 7, 8, or 9—were derived from the yarrow-stalk oracle. The assignment of these symbolic numbers was the contribution made to the Changes by a school of natural philosophers from the end of Chou times who were in line with the tendency of their age toward systemization. Yang was given 7 for a symbol and yin was given 8; a yin and yang together made fifteen; yang transforms 7 to 9 and yin transforms 8 to 6, and together the transformed numbers also made fifteen; thus the sum of the symbol and the sum of the transformed symbol were the same. These numbers continue in use today to represent the changes.
Using the yarrow-stalk method, the mathematical probabilities are asymmetrical. There is a greater possibility of obtaining a resting line (7 or 8 ) than there is of obtaining a changing line (6 or 9).
Yarrow Stalk Method Probability
|
Yarrow-stalk method probability |
Yin / Yang |
Number |
Symbol |
|
1/16 |
old yin |
6 |
|
|
3/16 |
old yang |
9 |
|
|
5/16 |
young yang |
7 |
|
|
7/16 |
young yin |
8 |
Three Coins
During the Tang dynasty (618–907 CE)—more than two thousand years after the I Ching was written—a simpler way to consult the oracle was devised, using three coins. The description of the process appears in the Tang-era book The Correct Significance of Rites. The coin method became popular during the Sung dynasty (1127–1279 CE) after it was promoted by Shao Yun, the most prominent I Ching scholar of this time. Traditionally, three of the old-type Chinese coins, with a hole in the middle and inscribed on one side and blank on the other, were used for this purpose. The procedure involves throwing three coins six times; each throw obtains a line. (Exact instructions for the coin method are found in nearly every modern English edition.) The entire procedure takes only a few minutes.
The coin oracle yields results more quickly than does the yarrow-stalk method; however, it too has a particular bias: the probability of obtaining changing yin and changing yang lines is equal, and the probability of obtaining a stable yin and a stable yang line are equal, but the probability of obtaining a stable line is greater than the probability of obtaining a changing line.
Three-coin Method Probability
|
Three-coin method probability |
Yin / Yang |
Number |
Symbol |
|
2/16 |
old yin |
6 |
|
|
2/16 |
old yang |
9 |
|
|
6/16 |
young yang |
7 |
|
|
6/16 |
young yin |
8 |
In addition to these methods, some modern commentators encourage even shorter methods that will result in only one changing line, so that the process and the interpretation are simplified (I would say over-simplified), so that the interpretation of the answer will not become too complex for modern Westerners who consult the I Ching.
The six-wand method dispenses with biased probability and returns to the changes of the I Ching equal dignity with stability.
Probabilities for Various Methods of Divination
|
Yarrow-stalk method probability |
Three-coin method probability |
Six-wand method probability |
Yin / Yang |
Number |
Symbol |
|
1/16 |
2/16 |
4/16 |
old yin |
6 |
|
|
3/16 |
2/16 |
4/16 |
old yang |
9 |
|
|
5/16 |
6/16 |
4/16 |
young yang |
7 |
|
|
7/16 |
6/16 |
4/16 |
young yin |
8 |
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