Charubel's image for this degree is armament with something missing: a man with a bow in his hand, but he has no arrow. The lack is the meaning. A bow alone is potential without projectile, technique without ammunition, the stance and the strength and the string all present, and nothing to loose. Read one way the picture is futility, preparation that forgot its essential supply, the archer discovering at the moment of need that readiness was incomplete; read another it is harmlessness deliberately chosen, weapon carried empty, the form of force kept while its lethality is left at home, which in the diplomat's sign has its own dignity, deterrence by posture, conflict conducted without anything that can actually wound.
The degree seems to hold both readings on purpose, because Libra's armoury genuinely runs this way: the sign fights with stance, charm and implied consequence, and rarely stocks arrows, so its confrontations are either elegantly bloodless or quietly unwinnable depending on the opponent. The bow also awaits; an arrow can be supplied, and the image can mark the interval before commitment arms an intention. The shadow is bluff calcified into character, a lifetime of drawn bows and empty quivers, threats and promises alike that were never loadable. On a natal Mars or Mercury this degree tends to mark those who project capability they prefer not to use, negotiators, deterrers, keepers of unfired force, and its counsel divides honestly: decide which the empty bow is, mercy or neglect, and stock the quiver accordingly.