If Guài has appeared in your reading, the book is naming a moment when something that has been wrong for some time must finally be brought into the open. Five yang lines have risen and pressed against the single yin line at the top. The breakthrough is at hand. What remains is to manage it without making it worse than the situation it ends.

Classical commentary reads this hexagram as the test of how to handle a decisive ending. The book is precise: the wrong configuration must be named openly, in the proper venue, and one's own house must hear it first. The temptation is either to suppress the announcement (the danger never gets resolved) or to make it violent (the resolution becomes the next problem). The book counsels neither.

What the book counsels is the speech act done in the right setting. 揚于王庭 — proclaim it in the royal court. Not in private grievance, not behind closed doors, but in the place where the proclamation has the institutional weight to actually end the wrong. And the strange warning: 不利即戎 — do not move to arms. The breakthrough's authority depends on its restraint.

Guài's failure mode is the violent resolution that converts the ending of a wrong into a new wrong of its own. The book is firm on this. The hexagram appears when the reader is at a decisive moment of confrontation. Speak the truth. Speak it in the open. Refuse the temptation to push further than the truth itself requires. The judgment ends with the clearance to proceed — but only on these terms.