Fable: The Eagle and the Arrow [1, 2]
An Eagle, after catching a fish, was soaring through the air. A hunter spied the Eagle as it flew back to his nest and the archer took careful aim. Suddenly the Eagle heard the whizz of an Arrow, and felt himself wounded by the winged dart.
Slowly he fluttered down to the earth, with his life-blood pouring out onto the ground.
Glancing down at the Arrow which had pierced him, the Eagle saw that the shaft of the Arrow had been feathered and guided with one of his own plumes.
“Alas!” he cried, as he lay dying: “Death has a double sting, for all too late I know
that my own Pride that lays me low!”
Moral of the story: We often give our enemies the means for our own destruction.