ONE winter a farmer found a snake stiff and frozen with cold. He had compassion on it, and taking it up, placed it in his bosom. The snake was quickly revived by the warmth, and resuming its natural instincts, bit its benefactor, inflicting on him a mortal wound. "Oh," cried the farmer with his last breath, "I am rightly served for pitying a scoundrel," The greatest kindness will not bind the ungrateful.
吃饭发鸡蛋，A不喜欢吃鸡蛋，每次发了鸡蛋都给B吃。刚开始B很感谢，久而久之便习惯了。习惯了，便理所当然了。于是，直到有一天，A将鸡蛋给了C，B就不爽了。她忘记了这个鸡蛋本来就是A的，A想给谁都可以。为此，她们大吵一架，从此绝交。
一开始，感激不尽。可是久了，便是习惯了。习惯了一个人对她的好，便认为是理所应当的。有一天不对她好了，你便觉得怨怼。其实，不是别人不好了，而是她的要求变多了。习惯了得到，便忘记了感恩