Thunder and lightning together, jaws biting through an obstacle: Shì Kè is decisive action against what obstructs — the problem that will not dissolve on its own and must be bitten through.
Its context is justice: something has interposed itself wrongly — an offense, a lie, an abuse — and clarity plus energy must remove it. The hexagram's honesty about difficulty is graded in its lines: some meat is tender, some old and poisonous. Bite anyway, with awareness of danger.
問Shì Kè appears when a relationship contains an obstruction that gentleness has failed to dissolve — a recurring lie, an unaddressed betrayal, an interfering third presence. The counsel is the direct conversation you have been avoiding: name the thing, cleanly and without cruelty. What blocks union must be bitten through, not chewed forever.
Professionally, this is the hexagram of enforcement: the underperformer never confronted, the broken process everyone routes around, the ethics issue awaiting daylight. Its model is thunder-and-lightning — clarity of case joined with energy of action. Address obstacles early while the stocks still fit the toes; the final line shows where deafness to warnings ends.
Inwardly, Shì Kè targets the self-obstruction you have negotiated with too long — the habit, the excuse, the poisonous old grievance you keep biting and rewrapping. Its practice is the clean decision: one honest act that goes through the thing rather than around it. Justice, applied to oneself, feels like this.
A line speaks only when it is a changing line in your own casting.