If Kùn has appeared in your reading, the book is naming a condition of genuine depletion. The lake has lost its water; the trigrams have reversed and the receptive surface is dry. The hexagram appears when the reader is exhausted, when the resources have run thin, and when the external help one might have hoped for is not forthcoming.

Classical commentary is unsentimental about this hexagram. There is no quick solution offered. The judgment names the difficulty plainly — 有言不信, words but no trust — and is clear that explanation will not currently change the configuration. What remains is the inner integrity. The book is asking the reader to maintain it under conditions in which maintaining it is hard and unrecognised.

What the book counsels is the disciplined refusal to abandon one's own line. The image's instruction — 致命遂志, stake your life and fulfil your purpose — is one of the book's strongest. The reader is being asked to continue being who they are even when continuing has stopped paying any visible dividend. The clearance 無咎 — without blame — depends on this. There is no other way through.

Kùn's failure mode is the panic that breaks form to escape the depletion. The book is firm. There are seasons in which the only useful action is to hold. Speak less. Spend what little you have only on the essential. Do not explain yourself to those who will not currently hear it. The configuration will change. Until it does, what is asked of you is to be intact when it does.