Be watchful or all will be lost.
系铃铛的狗
The Mischievous Dog
有一只狗总是在人们不注意的时候咬伤路过的人。主人就在他的脖子上系了一只小铃铛，这样小狗接近的时候人们就可以有所防备。挂了铃铛的小狗得意扬扬，以为这是一种无上的殊荣，四处炫耀。一只上了年纪的猎狗过来对他说：“你为什么要这样招摇呢？主人给你挂上铃铛并不是表彰你的美德，只是要让大家看清你的邪恶本性而已。”
不以为耻，反以为荣。
A Dog used to run up quietly to the heels of everyone he met，and to bite them without notice. His master suspended a bell about his neck so that the Dog might give notice of his presence wherever he went. Thinking it a mark of distinction，the Dog grew proud of his bell and went tinkling it all over the marketplace. One day an old hound said to him: “Why do you make such an exhibition of yourself？ That bell that you carry is not，believe me，any order of merit，but on the contrary a mark of disgrace，a public notice to all men to avoid you as an ill mannered dog.”