Six in the third place is one of the plainer cautions in the sixty-four figures. As a changing line it tells a querent that an association now forming, or already formed, is with the wrong people, and that the harm expected from it follows from the association itself rather than from any further mistake. The line names no way to make the bond work. Its only implicit counsel is to recognize what is being joined before the joining is complete.
Flipping this yielding line to firm turns the lower trigram Kun into Gen, mountain, and water over mountain gives Obstruction, King Wen 39. The transformation reads with unusual directness. Hardening the position, asserting oneself inside the wrong company rather than withdrawing from it, does not repair the situation; it produces a mountain in the path with water beyond it, a figure whose whole counsel is that forward movement is blocked and that turning back and seeking help is the wise course.
A reading landing here is therefore not fatalistic but corrective. The querent is being told that the difficulty lies in whom they have chosen, not in how hard they are trying, and that force applied to a badly chosen alliance produces obstruction rather than progress. What Obstruction itself recommends, turning inward and reconsidering the route, is the counsel the third line withholds and its transformation supplies.