An eagle was soaring through the air when suddenly it heardthe whizz of an arrow, and felt itself wounded to death. Slowlyit fluttered down to the earth, with its life-blood pouring out ofit. Looking down upon the arrow with which it had been pierced,it found that the shaft1 of the arrow had been feathered with oneof its own plumes2. "Alas3!" It cried, as it died, 
We often give our enemies the means for our own destruction. 