Six at the top is read as a hard line and it is worth reading honestly. As a changing line it tells a querent that the opportunity to join something has passed, that the approach now being contemplated comes after the point at which it could have counted, and that no favorable outcome is available on the present terms. The line does not blame. It reports that a first step was never taken, and that what is being attempted now depends on that step having been taken.
Flipping the yielding stroke to firm changes the upper trigram Kan into Xun, wind, and wind over earth gives Contemplation, King Wen 20, a figure about observing from a height rather than participating from within. The transformation is unexpectedly gentle and supplies what the line itself withholds. What is left to someone who has missed the moment is to look, to understand what was formed and how, and to be seen in turn, which is the discipline Contemplation describes.
A reading landing here counsels a querent to stop pressing an entry that will not open and to take up the position the transformation offers instead. Late attachment has no good issue in this hexagram, but clear observation of the thing one failed to join is not the same as exclusion from it, and it is the only ground from which a proper beginning could ever be made elsewhere.