METHODS · 6 MIN READ
How I Ching Hexagrams Work
Learn how trigrams, six-line hexagrams, changing lines, and textual interpretation fit together.
An I Ching (易经, Yìjīng) hexagram is a figure made of six lines, each either solid or broken. The lines are grouped into two trigrams: a lower trigram and an upper trigram. Since there are eight possible three-line trigrams, combining one above another produces sixty-four hexagrams.
The trigrams have names and traditional associations. In common tables they are associated with images such as Heaven, Earth, Thunder, Wind, Water, Fire, Mountain, and Lake. These associations are part of a layered interpretive tradition; they are not a code that yields one automatic answer in every context.
What is written for each hexagram#
The received Zhouyi has a hexagram statement and six line statements. Commentaries add further interpretive material. A reader should keep these layers separate: a statement in the core text is not the same as a later commentary or a modern paraphrase.
In a divination procedure, a method generates a primary hexagram and may identify changing lines that lead to another hexagram. Different procedures have different rules for generating and interpreting these signs. For example, the yarrow-stalk method has its own sequence of operations, while coin-based methods use a shorter procedure. Later systems may add chart positions, calendars, or additional rules.
A simple way to study the structure#
- Learn the three-line form of each trigram.
- Identify the upper and lower trigrams in a hexagram.
- Read the hexagram statement and the relevant line statements in the edition you selected.
- Record which casting method produced the figure and which interpretive convention you are using.
This process makes a reading easier to reproduce. It does not turn the text into a deterministic answer key. The wording, commentarial layer, method, and question all shape interpretation.
Do not mix the diagram with the conclusion#
Recognizing a hexagram correctly is a structural task. Interpreting its text is a hermeneutic task. Claiming that the reading accurately predicts an external event is an empirical task. A careful account explains which task it is addressing and what evidence would support the claim.
The Chinese Text Project hosts the received Book of Changes. For the common English reference label, see Hexagram (I Ching).