The reason is: this story tells us that to help people, we must first learn to distinguish between good and bad, and then protect ourselves from harm in the right way. We denounced those wicked people who bite the hand that feeds them, and those hypocritical people who help them, and warned us to learn to distinguish right from wrong and not to deal with bad people, because foxes can bark and snakes sometimes get into trouble, so this fable warned us to distinguish right from wrong. Fables of krylov is a book published by Hope Publishing House from June 5438 to October 2009. The writer is Ian krylov. This book collects 203 fables written by krylov in his life.