If Dà Guò has appeared in your reading, the book is naming a moment when the weight on the structure has exceeded what the structure was built to carry. Four yang lines stacked in the middle of the hexagram, two yin lines at the ends; the centre is heavy, the supports are slender. The ridgepole bends.

Classical commentary reads this hexagram as the configuration in which extraordinary action becomes the right action — and only such configurations. Most of the book counsels measure. This hexagram counsels a willingness to do what the ordinary frame would not allow. The lake has risen above the trees. Pretending the trees are still the right reference will not save them.

What the book counsels is the lonely competence that great pressure asks for. 獨立不懼 — stand alone without fear — is one of the book's most demanding lines. The reader is being asked to act decisively in a situation where the usual checks of consensus and convention have stopped being useful. This is permission, not entertainment. The pressure is real and so is the cost.

Dà Guò's failure mode is the dramatic gesture undertaken in a situation that did not actually require it. The book reserves this clearance for the genuine load. The hexagram appears when the reader is facing something that does not fit inside the available forms. The work is to find what does fit — even if the finding requires standing alone for a while.