Hexagram 21 — Shi Ke / Biting Through (噬嗑)
Hexagram 21 describes a situation where something stands in the way of union or completion — an obstacle, a dispute, a blockage that must be decisively removed. The counsel is to act with clarity and force, to bite through what is in the way rather than working around it indefinitely.
Structure
Shi Ke is formed by Fire (Li ☲) above Thunder (Zhen ☳). Fire illuminates from above while thunder moves decisively below — the combination of clear vision and forceful action. The hexagram's shape resembles an open mouth with something between the teeth: the upper and lower jaws (the first and last lines) are separated by an obstacle (the fourth line). Biting through that obstacle is the central act the hexagram describes.
Core meaning
The image of biting through is precise and instructive. When you bite through something hard, you need both clarity about where to bite and sufficient force to complete the action. Half-measures do not work — a partial bite leaves the obstacle still in place and may make the situation worse. The hexagram asks for committed, well-aimed action.
Shi Ke is traditionally associated with legal matters, disputes, and the administration of justice. The obstacle between the jaws can represent a legal impediment, a person who is obstructing a process, a misunderstanding that has hardened into conflict, or any situation where something must be formally resolved rather than informally worked around.
The fire above provides the illumination needed for accurate judgment. You cannot bite through effectively if you cannot see clearly what you are biting. The thunder below provides the decisive force. Both are necessary: clear perception followed by committed action.
In Liuyao readings, Shi Ke often appears when a situation has reached a point where it cannot be resolved through patience or accommodation alone. Something must be confronted directly. This might be a difficult conversation that has been avoided, a legal or contractual matter that needs formal resolution, or a personal habit or pattern that must be broken rather than managed.
In divination
When Shi Ke appears in a reading, identify the obstacle. What specifically is preventing the situation from resolving? Once identified, the hexagram counsels direct engagement rather than avoidance. The action required may be uncomfortable, but it is necessary and ultimately productive.
Shi Ke is favorable for questions about resolving disputes, making decisions, and breaking through stagnation. It is less favorable for situations requiring patience, gradual development, or diplomatic finesse.
Move from research into a real reading
If this page helped you frame the question, the next step is to run a reading with that same clarity.