As a divinatory line, six at the third place of Gathering Together reads within the hexagram's overall concern with union and being collected, docile obedience leading on to satisfaction; the king approaches his temple, and firm correctness brings advantage. 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. Its own text, that gathering together with sighing, nothing that will be advantageous, but going forward brings no great error though there is a little occasion for regret, is the particular fortune assigned to this one stage of the situation, not to the hexagram as a whole.
The third line corresponds by classical convention with the sixth line, and the two do not correspond here, since both lines share the same character. Read together with the trigram it belongs to, Kun in the lower position of the figure, the line marks the hinge between the two trigrams, the last word the lower trigram gets before the upper trigram takes over, 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 third line of Gathering Together turns Kun into Gen while the other trigram, Dui, stays as it is, which yields Gathering Together's changing partner, Influence (King Wen 31), the hexagram this line is recorded as transforming into.