As a divinatory line, six at the fifth place of The Marrying Maiden reads within the hexagram's overall concern with action taken now will be evil, in no way advantageous. 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 the marrying of a ruler's younger sister, whose sleeves are not as fine as her attendant's, like the moon almost full, good fortune, 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 correspond here, since one line is yin and the other yang. Read together with the trigram it belongs to, Zhen 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 The Marrying Maiden turns Zhen into Dui while the other trigram, Dui, stays as it is, which yields The Marrying Maiden's changing partner, The Joyous (King Wen 58), the hexagram this line is recorded as transforming into.