The Wolf in the Sheep's Clothing

In this story, I thought the maxim was tricky to find out. Then I realized, the moral was that guile and deceive are all over the world and these methods lead to something terrible. People should always be careful and not trust every single person they see. Hopefully, shortly after the incidence, the criminal will be caught and will be punished. In addition, at the end of the story, the author mentioned that for sometime, the Wolf succeeded in deceiving the sheep. So after the Lamb was killed, the sheep must have noticed it missing and killed the Wolf or punished it.