A tortoise desired to change its place of residence, so he asked an eagle to carry him to his new home, promising her a rich reward for her trouble. The eagle agreed and seizing the tortoise by the shell with her talons soared aloft. On their way they met a crow, who said to the eagle: "Tortoise is good eating.""The shell is too hard," Said the eagle in reply. "The rocks will soon crack the shell," Was the crow's answer; and the eagle, taking the hint, let fall the tortoise on a sharp rock, and the two birds made a hearty meal of the tortoise. 
Never soar aloft on an enemy's pinions. 