Those to whom you give kindness may turn on you.
狗群和牛皮
The Dogs and the Hides
几只饥饿的狗看见河面中心漂浮着一张牛皮，就想拿来充饥。可是牛皮距离河岸太远，他们想尽了办法也够不着。经过商量后，他们决定喝干河里的水，这样就可以得到那张牛皮了。结果，牛皮还没有拿到手，他们的肚皮就被河水胀破了。
不要尝试办不到的事情。
Some Dogs famished with hunger saw a number of cowhides steeping in a river. Not being able to reach them，they agreed to drink up the river，but it happened that they burst themselves with drinking long before they reached the hides.