Changing lines are the I Ching's most elegant mechanism — they transform your hexagram into a second hexagram, showing not just where you are but where you're heading.
How They Work
When you cast a hexagram (via coins or yarrow stalks), each line can be one of four types:
- Young Yang (7) — Stable solid line. It stays.
- Young Yin (8) — Stable broken line. It stays.
- Old Yang (9) — Changing solid line. It transforms into a broken line.
- Old Yin (6) — Changing broken line. It transforms into a solid line.
The "old" lines are at their extreme and tip over into their opposite — yang so full it becomes yin, yin so empty it becomes yang. When these changing lines transform, you get a second hexagram: your relating hexagram.
Reading Them
First, read the primary hexagram's overall judgment. Then read the specific line texts for each changing line — these are the most targeted and actionable parts of the reading. Finally, read the relating hexagram's judgment to understand the trajectory.
A reading with no changing lines means the situation is stable — what you see is what you get. A reading with many changing lines means rapid transformation is underway. The number and positions of changing lines shape the entire reading's character.