As a divinatory line, six at the fifth place of Keeping Still reads within the hexagram's overall concern with resting like the back, so one loses all consciousness of self, walking in one's own courtyard and not seeing the persons in it, no error. The line occupies a place that does not match its own nature in the classical doctrine that odd places favour a firm, yang line and even places favour a yielding, yin line. It is also one of the two central lines of the hexagram, the place classical reading treats as the most balanced regardless of the line's own character. Its own text, that keeping the jawbones still, so that words are always well ordered, occasion for repentance disappears, is the particular fortune assigned to this one stage of the situation, not to the hexagram as a whole.
The fifth line corresponds by classical convention with the second line, and the two do not correspond here, since both lines share the same character. Read together with the trigram it belongs to, Gen in the upper position of the figure, the line marks the ruling stage of the hexagram, the place classical reading treats as its centre of authority, one stage in the six stage movement the hexagram traces from its first line to its last.
A change at this line, from yin to its opposite, is the mechanism the tradition uses to move from one hexagram to another. Flipping the fifth line of Keeping Still turns Gen into Xun while the other trigram, Gen, stays as it is, which yields Keeping Still's changing partner, Development (King Wen 53), the hexagram this line is recorded as transforming into.