Six in the fourth place is drawn when a querent is being asked, in effect, whether they intend to keep tolerating something they have already recognised as wrong. The answer is unusually blunt. Advancing while the fault remains untouched leads to regret, and the accompanying commentary removes the alternative reading by saying that going forward will not succeed. Neither sentence promises disaster, and neither offers a way to proceed without dealing with the matter first.
Structurally the line is properly placed, yielding in an even position, and querents sometimes take that correctness as reassurance. It is not. The position is right and the conduct is not, which is precisely why the line is worth drawing. Yielding is the appropriate quality here only if it yields to the work rather than to the temptation to leave a difficult inheritance undisturbed.
In practice this line often marks a deferral that has already been made once and is about to be made again, in a business handed on in poor condition, a policy nobody wants to reopen, or a family arrangement everyone can see is failing. The counsel is to stop the forward motion until the correction is actually begun, because the cost named here is not the cost of acting but the cost of continuing.