A mouse, in order that he might pass over a river with greater ease, sought the aid of a frog. She tied the fore leg of the mouse to her hinder thigh. Hardly had they swum to the middle of the river, when the frog dived suddenly, trying to reach the bottom, that she might perfidiously deprive the mouse of life. While he struggled with all his might not to sink, a kite that was flying near at hand, beheld the prey, and seizing the floundering mouse in his talons, at the same time bore off the frog that was fastened to him. 
Thus do men often perish while meditating the destruction others. 