As a divinatory line, six at the first place of Small Preponderance reads within the hexagram's overall concern with progress and attainment, but advantage in being firm and correct; small affairs may be undertaken but not great ones, as with a bird flying past that leaves its cry behind, for whom it is not fitting to ascend but only to descend, and there great good fortune. 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 a bird flying upward, and there will be evil, is the particular fortune assigned to this one stage of the situation, not to the hexagram as a whole.
The first line corresponds by classical convention with the fourth line, and the two correspond here, since one line is yin and the other yang. Read together with the trigram it belongs to, Gen in the lower position of the figure, the line marks the opening of the situation, before the trigram above it has any part in the reading, 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 first line of Small Preponderance turns Gen into Li while the other trigram, Zhen, stays as it is, which yields Small Preponderance's changing partner, Abundance (King Wen 55), the hexagram this line is recorded as transforming into.