The first line of Possession in Great Measure opens the hexagram before its central subject, abundance, has actually arrived in any tested form. Legge's translation describes a state in which there is as yet no association with what is injurious, and adds that there is no error so long as the difficulty that will eventually come is kept in mind rather than forgotten. The line does not promise that great possession will remain untroubled forever. It only observes that at this earliest point, nothing harmful has yet made contact with it, and that this innocence is itself worth preserving through awareness rather than complacency.
Hexagram 14 places Fire above Heaven, the sun shining over all things, and its Judgment promises supreme success to whoever holds great possession rightly. The first line stands at the foot of that promise, before wealth, influence, or ability have drawn any of the envy or opposition that abundance typically attracts. Nothing here is yet won or lost; the line simply marks the moment before exposure begins.
This is the base of the lower trigram Qian, heaven's own trigram, and a yang line correctly occupies this odd position, giving the opening of great possession a soundness matched to its innocence. The line's entire counsel is contained in that one phrase, no error, provided awareness of coming difficulty is kept: strength has not yet been tested, but keeping watch now is what allows the following five lines to build on solid ground rather than false security.