
I Ching · King Wen 21
Hexagram 21: Biting Through
䷔ 噬嗑 Shì Kè · also called Gnawing Bite, Decisive Action, Reform · The Clinging above The Arousing
An obstruction that must be bitten through: clear, firm, lawful action against what is in the way.
decisivenessjusticeclarityobstaclepenalty
The meaning of Hexagram 21
Thunder below, fire above: lightning and thunder, clarity and force together. The image is of a mouth with something stuck in it that must be bitten through before the jaws can close. Biting Through describes an obstacle, often a person or a wrong, that cannot be talked around and must be dealt with decisively. The tradition's judgement is that it furthers to administer justice: to act with the clarity of lightning and the firmness of thunder, in proportion, under rule. The reading is favourable to firm action and it insists that the action be fair.
The image. Thunder and lightning; the ancient kings made the penalties clear and the laws known.
- Advice
- Identify the obstruction precisely and remove it with firm, fair, proportionate action.
- Warning
- Force without clarity, or punishment beyond the fault, turns justice into a new wrong.
over
Structure: ☳ The Arousing (Thunder) below, ☲ The Clinging (Fire) above. Nuclear hexagram 39, Obstruction. Every line reversed: 48, The Well.
Hexagram 21 for love and relationships
Something is stuck between you and it will not clear on its own. Name it plainly and deal with it. Firmness here is kindness; the obstruction left in place poisons everything around it.
Hexagram 21 for career
An obstacle, a wrong or a person who is blocking things, and the moment to act on it decisively. Be clear about the facts, proportionate in the response, and do not let it drag. Justice, not vengeance.
Hexagram 21 for money
A dispute, a debt or a bad arrangement that needs resolving by firm action. Get the facts straight, act through proper channels, and bite through rather than nibbling.
Hexagram 21 for decisions
Decide firmly and act. The reading supports the decisive option, and it conditions it on fairness and clarity: know exactly what the obstruction is before you bite.
The six changing lines
Read from the bottom. A changing line flips, and the hexagram it changes into is named with each.
Neck in the cangue, ears hidden. Misfortune.
The incorrigible: someone who has been warned repeatedly and refuses to hear, until the penalty is severe. The line describes the outcome for those who will not listen. If it applies to you, the ears are the point.
Changing, it becomes Hexagram 51, The Arousing. Read line 6 →
Biting on dried lean meat, receiving yellow gold. Persistently aware of danger. No blame.
The one with authority judging a difficult matter fairly, aware of the danger of both leniency and severity. Yellow is the colour of the mean, gold of firmness. Impartiality under pressure.
Changing, it becomes Hexagram 25, Innocence. Read line 5 →
Biting on dried gristly meat, receiving metal arrows. It furthers to be mindful of difficulties and persistent.
A hard case against a powerful opponent, requiring both firmness and awareness. The metal arrows are the qualities needed: straight and hard. The line promises success to someone who does not underestimate the difficulty.
Changing, it becomes Hexagram 27, Nourishment. Read line 4 →
Biting on old dried meat and striking on something poisonous. Slight humiliation. No blame.
An old wrong, long neglected, which resists correction and provokes resentment when it is finally addressed. The line says to proceed anyway. The unpleasantness is the cost of having waited, not a reason to stop.
Changing, it becomes Hexagram 30, The Clinging. Read line 3 →
Biting through soft meat, nose disappears. No blame.
An easy case, dealt with a little too vigorously; the punisher gets carried away. The tradition forgives it because the fault was clear and the overreach small. Keep the proportion in mind next time.
Changing, it becomes Hexagram 38, Opposition. Read line 2 →
Feet in the stocks, toes hidden. No blame.
A first, mild correction applied early to a small fault. It stops the person before the fault grows. The line approves: a light penalty at the start prevents a heavy one later.
Changing, it becomes Hexagram 35, Progress. Read line 1 →
Related hexagrams
Cast your own reading
Ask a question and toss six lines. The oracle does not choose the hexagram for you; the coins do.
Ask the I Ching →Common questions
- What does I Ching Hexagram 21 mean?
- An obstruction that must be bitten through: clear, firm, lawful action against what is in the way. Thunder below, fire above: lightning and thunder, clarity and force together. The image is of a mouth with something stuck in it that must be bitten through before the jaws can close. Biting Through describes an obstacle, often a person or a wrong, that cannot be talked around and must be dealt with decisively. The tradition's judgement is that it furthers to administer justice: to act with the clarity of lightning and the firmness of thunder, in proportion, under rule. The reading is favourable to firm action and it insists that the action be fair.
- What does Hexagram 21 mean for love?
- Something is stuck between you and it will not clear on its own. Name it plainly and deal with it. Firmness here is kindness; the obstruction left in place poisons everything around it.
- Which hexagram does Hexagram 21 change into?
- It depends on which lines change. With one changing line: line 1 gives Hexagram 35, Progress; line 2 gives Hexagram 38, Opposition; line 3 gives Hexagram 30, The Clinging; line 4 gives Hexagram 27, Nourishment; line 5 gives Hexagram 25, Innocence; line 6 gives Hexagram 51, The Arousing. With every line changing it becomes Hexagram 48, The Well.

