Understanding Changing Lines in the I Ching

How many changing lines you get determines which part of the reading to focus on. A clear rule for all six cases, including the special Use Nine and Use Six texts.

The number of changing lines tells you what to read

Most people get stuck at the same point after casting: there is a judgment for the primary hexagram, another for the derived hexagram, and six line texts. Which one applies?

The answer depends on how many changing lines you drew. Commentators differ on the details, but the mainstream rule is consistent enough to use directly.

The six cases

No changing lines

Read the primary hexagram judgment, supported by the Image text. Individual lines are not active. The situation is stable, without an obvious turning point.

One changing line

The clearest case. That single line text is your primary guidance, with the hexagram judgment as context. It usually speaks directly to the matter you asked about.

Two changing lines

The higher line takes precedence. If one is yang and one is yin, favour the yang line. The other remains a secondary factor.

Three changing lines

Primary and derived hexagrams carry equal weight. The situation is genuinely in transition; present and emerging conditions matter equally.

Four changing lines

The derived hexagram leads. Focus on its two unchanged lines — when most things are moving, what holds still is what matters.

Five changing lines

Read the single stable line in the derived hexagram. Nearly everything is shifting; the one fixed point carries the meaning.

All six changing

Read the derived hexagram judgment. Two hexagrams are exceptions: Qian (1) uses its Use Nine text and Kun (2) uses Use Six. These are the only two supplementary line texts in the entire book.

Why line texts are more precise

A hexagram judgment describes a whole situation — there are sixty-four of them. A line text describes a specific position and moment within that situation — there are three hundred and eighty-four.

Position changes everything. Within the same hexagram Qian, the first line says "hidden dragon, do not act," while the fifth says the dragon is flying and the moment is right. Opposite guidance, one hexagram.

The derived hexagram is not "the outcome"

A frequent misreading treats the derived hexagram as what will happen. More accurately: it shows where things tend to go if the current movement continues unchanged. It is a trajectory, not a destination — any intervening response can alter it.

Cast on the casting page and the changing line texts will be listed automatically, along with which reading rule currently applies.