Nine in the fifth place is the most favourable line in The Abysmal, and a querent should read its modesty as accuracy rather than as discouragement. Water filled only to the border of the pit, with no error, describes a situation that has stopped getting worse and has not begun to get better. The commentary adds that the work is not yet achieved. Taken together this is a reading about competent containment, and about resisting the urge to declare a difficulty over merely because it has stopped growing.
The position is the strongest available anywhere in the figure. This stroke is strong, central and correctly placed at the ruling seat of the upper trigram Kan, the only line in the hexagram to be all three at once, and that is why containment is possible here where it was not lower down. Somebody drawing this line usually has real authority over a dangerous situation and a limited mandate within it. What they can do is hold the level. What they cannot yet do is empty the pit.
When the line changes, the upper trigram Kan becomes Kun and the figure becomes The Army, King Wen 7, a single strong line commanding a mass of yielding ones under discipline. The movement suits the counsel exactly. Danger held steady by one competent centre becomes an organised undertaking, and the way out of mere containment runs through discipline rather than through any sudden relief.