Biting Through
Thunder below and fire above — something in the way is ready to be bitten through for the connection to be made. An obstacle stands between what should be joined, and the moment calls for decisive action rather than continued negotiation around what cannot simply be gone around. Clarity applied firmly is how the obstruction is resolved.
Structure
☲ Fire
☳ Thunder
Changing lines
When a three-coin cast produces a 6 (three tails) or 9 (three heads) at a given position, that line is in motion — old yin transforming into yang, or old yang into yin. A cast with changing lines yields two hexagrams: the primary describes the present situation, and the transformed hexagram (formed by flipping the changing lines) describes where things are heading. Together they trace a direction, not just a fixed state.
Cast this hexagram yourself on the I Ching reading page to see which lines are moving in your actual throw.
Related hexagrams
Hexagram 21 — common questions
What does Hexagram 21 — Biting Through mean?
Thunder below and fire above — something in the way is ready to be bitten through for the connection to be made. An obstacle stands between what should be joined, and the moment calls for decisive action rather than continued negotiation around what cannot simply be gone around. Clarity applied firmly is how the obstruction is resolved.
What if my cast shows changing lines for this hexagram?
Changing lines (a 6 or a 9) mark the lines in motion — the specific aspects of this situation that are actively shifting. The hexagram that forms by flipping those lines describes what the situation is becoming. Reading the primary hexagram alongside the transformed one gives you a picture of direction, not just a snapshot.
How is a hexagram cast?
Three coins are thrown six times, one throw per line, building from the bottom up. Heads count as 3 (yang) and tails as 2 (yin). Each toss sums to 6, 7, 8 or 9: 6 and 9 are changing lines; 7 and 8 are stable. The King Wen sequence then maps the six lines to one of 64 hexagrams.
Hexagram 21 in the context of your actual chart
A hexagram cast by itself describes a situation. Orvela reads it alongside your birth chart, your current Vedic timing, and the moon — and remembers what this cast meant last time.