Hexagram 21 噬嗑 Shì Kè for Decision Questions 噬嗑 問決策

Hexagram 21 (噬嗑, Shì Kè) is one of the 64 classical I Ching hexagrams. Wilhelm’s English translation renders the hexagram’s name as “Biting Through”. This page describes how classical commentary reads this hexagram when received in answer to a decision question.

“Biting Through has success. It is favorable to let justice be administered.”
— classical judgment text

“Thunder and lightning: the image of Biting Through. Thus the kings of former times made firm the laws through clearly defined penalties.”
— classical image text

The hexagram’s general theme

Something obstructs the union — there is something between the jaws. Bite through. Apply penalty with clarity, not malice. Justice executed quickly.

Classical keywords: biting through, removing obstacles, law and penalty, decisive justice, obstruction.

噬嗑 Shì Kè read for decision questions

Classical I Ching commentary reads decision questions through the hexagram’s register of timing, alignment, and the relationship between proposed action and surrounding conditions. The hexagram describes the field of forces around the decision; classical doctrine reads whether the moment favours proceeding, waiting, reframing the question, or pivoting to a different option entirely.

The hexagram’s register does not have explicit decision-domain resonances in its modern interpretive keys, but applies to decision questions through its general theme described above.

Classical guidance for the hexagram: Identify the obstruction precisely. Bite through with proportionate force. Justice that is too lenient or too late is worse than firm action.

Read against a decision question, this guidance describes the field of forces around the hexagram’s register of timing, alignment, and the relationship between proposed action and surrounding conditions. the hexagram describes the field of forces around the decision; classical doctrine reads whether the moment favours proceeding, waiting, reframing the question, or pivoting to a different option entirely.. The action the guidance suggests — or warns against — applies to the decision question being asked, with the chart-specific qualifications that consultation provides.

Configuration

• Hexagram: #21 噬嗑 (Shì Kè), “Biting Through”
• Question type: Decision (決策)
• Question domain: Binary choices, multi-option decisions, timing of action, whether-to-proceed questions
• Upper trigram: li · Lower trigram: zhen
• Hexagram lines (top to bottom): 101001 (1 = yang / solid, 0 = yin / broken)

Why a generic hexagram-for-decision interpretation falls short

This page describes what classical commentary reads when Hexagram 21 is received for a decision question — the hexagram’s general register applied to the decision domain. But a complete I Ching reading for a specific question requires the casting method (yarrow vs three-coin), identification of changing lines, the resulting secondary hexagram, and integration with the querent’s specific BaZi chart. Without those, the reading is reference-level — the broad register, not the chart-specific application. For chart-aware reading on a specific high-stakes decision, book a BaZi consultation. The four-pillar chart layered with the I Ching reading and the timing analysis produces decision-level diagnostic depth.

Hexagram 21 噬嗑 Shì Kè read for a decision question is one input in a complete classical reading — not the whole answer. Classical I Ching practice layers four inputs together; the hexagram is only the second.

1. The casting method and quality of the question. Yarrow stalk vs three-coin vs other methods produce different statistical distributions of changing lines. The framing of the question itself shapes the answer — vague or compound questions return readings that classical commentary specifically warns against. A consultation handles both the casting and the question-framing as part of the reading.
2. The hexagram itself. What this page describes — the classical register of the hexagram and how it reads for the specific question type. Useful as reference; not sufficient on its own.
3. Changing lines and the secondary hexagram. Most I Ching readings produce one or more changing lines (动爻) which determine a secondary hexagram (之卦) representing how the situation evolves. The reading is the primary hexagram’s present register modulated by the changing lines and resolved by the secondary hexagram’s future register. Identifying which lines have changed and reading the secondary hexagram is the chart-casting skill that consultation provides.
4. The querent’s specific BaZi chart. Classical practice layers the I Ching reading with the querent’s four-pillar BaZi chart — the chart describes the querent’s position within the field of forces the hexagram describes. Two people receiving the same hexagram in answer to the same kind of question often need different responses based on their charts.

This page describes the second input — Hexagram 21 噬嗑’s register for decision questions. The reading is a useful starting reference. It is not a substitute for a chart-aware reading that layers in the other three. Master Sean Chan’s BaZi consultation reads all four layers against your specific question.

• Recognise the hexagram’s general register first. Something obstructs the union — there is something between the jaws. Bite through. Apply penalty with clarity, not malice. Justice executed quickly.
• Read it through the decision-question lens. Classical I Ching commentary reads decision questions through the hexagram’s register of timing, alignment, and the relationship between proposed action and surrounding conditions. The hexagram describes the field of forces around the decision; classical doctrine reads whether the moment favours proceeding, waiting, reframing the question, or pivoting to a different option entirely.
• Note the classical guidance. Identify the obstruction precisely. Bite through with proportionate force. Justice that is too lenient or too late is worse than firm action.
• Recognise that this is one input of four. A complete I Ching reading layers the casting method, the hexagram, the changing lines and secondary hexagram, and the querent’s BaZi chart together. Book a chart-aware consultation to combine all four layers.