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Repair common Windows errors and clear accumulated junk for a smoother, more stable PC - no reinstall needed.Free scan · no reinstallAn I Ching hexagram is a six-line figure made from solid yang lines and broken yin lines. Lines are counted from the bottom upward. In the Wilhelm/Baynes casting method, lines valued 6 or 9 are moving lines: each flips to its opposite to form a second hexagram. To read a casting, start with the primary hexagram and its moving-line texts, then consider the resulting hexagram; how much weight to give each part depends on the interpretive method.
What is an I Ching hexagram?
The I Ching, also called the Book of Changes, has 64 hexagrams. Each is built from six stacked lines: a solid line represents yang, and a broken line represents yin. Read the lines from the bottom upward. A hexagram can also be understood as two three-line trigrams, one above the other. Hexagram-level text and individual line texts provide material for interpretation. Wikipedia’s I Ching overview and the hexagram overview give basic orientation; the Wilhelm/Baynes consultation instructions describe one method for casting and reading them.
What are changing lines?
In the line-value system described in the Wilhelm/Baynes consultation appendix, each cast line has a value of 6, 7, 8, or 9. Values 6 and 9 are old, or moving, lines; values 7 and 8 are stable. A moving line changes from yin to yang or yang to yin. Stable lines stay as cast. Some notation marks moving yin with an X and moving yang with a circle, though notation conventions can vary. The Wilhelm/Baynes consultation appendix describes this method.
| Value | Line type | Does it change? |
|---|---|---|
| 6 | Old yin (broken) | Yes; becomes yang (solid) |
| 7 | Young yang (solid) | No; remains yang |
| 8 | Young yin (broken) | No; remains yin |
| 9 | Old yang (solid) | Yes; becomes yin (broken) |
How does a moving line create a second hexagram?
Keep the six lines in their original bottom-to-top order, flip every moving line, and leave every stable line unchanged. The original figure is the primary hexagram; the new figure is commonly called the transformed or relating hexagram. The second figure is not a separate casting: it follows mechanically from changing the moving lines in the first.
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A one-line example
Suppose a cast has one old-yang line and five stable lines. Flip that one solid line to broken, keeping the other five lines in place. The resulting six-line pattern is the second hexagram. This describes only how to form it; the meaning depends on the relevant text and interpretive tradition.
How do you read a hexagram with changing lines?
- Identify the primary hexagram and consult its overall text, using the translation or reference you have chosen.
- For each moving line, read the corresponding line text in the primary hexagram.
- Flip the moving lines to identify the resulting hexagram, then consider its text as part of the reading.
The mechanics identify which texts are relevant, but they do not impose one universal rule for how to weigh the primary hexagram, line texts, and resulting hexagram. State or follow the convention used by your translation or teacher rather than treating one weighting approach as mandatory.
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What if no lines change?
If all six lines are stable in the Wilhelm/Baynes method, no individual line text is activated by the moving-line rule. The consultation appendix directs readers to the hexagram-level Judgment and Image material. Because no lines flip, this method does not produce a different resulting hexagram.
What if several lines change?
Multiple moving lines are possible. Their presence does not change the mechanical procedure: flip every moving line, and leave stable lines alone. The interpretive question is how to handle several line texts and the resulting figure. Traditions and guides differ, so the convention matters.
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A UAYA educational guide presents examples of non-universal heuristics: reading both line texts when two lines change; giving particular attention to the middle moving line in some readings with three; and shifting attention toward stable lines or the resulting hexagram when four or five change. For six changing lines, it notes special “Use of Nines” and “Use of Sixes” texts for hexagrams 1 and 2. The guide identifies these as guidelines, not rigid rules, and does not establish a practice shared by all historical schools. UAYA’s guide to changing lines explains its approach.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.How are hexagrams cast?
Two described methods are coin casting and yarrow-stalk casting. Both generate six line values; the changing-line process applies after those values have been recorded. A printed I Ching translation or beginner reference is useful because the reading requires the hexagram and line texts. Yarrow stalks are an optional physical tool for someone choosing that particular method.
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| Method | Materials and procedure | Practical distinction |
|---|---|---|
| Three coins | Coins are used to generate each line; repeat until six lines are recorded. | The overview describes this as quicker than the stalk method. |
| Yarrow stalks | Use 50 stalks, set one aside, then repeatedly divide and count the remainder to generate a line; repeat until six lines are recorded. | The overview describes this as a more involved procedure. |
These are procedural distinctions, not claims that one method gives a more accurate interpretation. The hexagram and changing-line mechanics can be used with either; interpretive conventions, especially for multiple moving lines, can still differ.
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