The haft of the arrow had been feathered with one of [the eagle’s] own plumes…. We often give our enemies the means for our own destruction.

This sentiment is commonly attributed to Aesop via the fable usually titled “The Eagle and the Arrow.” In the story, an eagle is struck by an arrow and, seeing that the arrow’s shaft is feathered with the eagle’s own plume, laments that it has been wounded by something made from itself. The fable circulated in Greek and later Latin traditions and became a standard moral exemplum in European collections and schoolbooks, often used to illustrate how one’s own resources, gifts, or internal divisions can be turned against oneself. The quoted wording, however, reflects a modern English paraphrase rather than a fixed ancient formulation.

The image of an arrow fletched with the eagle’s own feathers sharpens the moral: the most painful defeats can be enabled by what we ourselves supply—carelessness, pride, secrets, tools, or concessions that an adversary repurposes. Beyond literal “giving the enemy weapons,” the fable points to complicity and self-sabotage: institutions empower forces that later harm them; individuals nurture habits that undo them; communities arm opponents through disunity. The line’s enduring force lies in its compressed irony: the eagle’s strength (its feathers) becomes part of the mechanism of its injury, warning that vulnerability often originates within.