What's Really Behind The Wolf,s In A Sheep's Clothing?

From the Latin Literature to the European Vernacular Literature, to Aesop's Fable 1867. 

A wolf's in sheep clothing is an idiom. That draws into a confusion, though still falls one's basic nature eventually betray's itself.

A cautionary advice that one cannot necessarily trust someone who appears kind and friendly has been with us for many centuries.

Happy Halloween !!!

Eye of newt, and toe of frog,
Wool of bat, and tongue of dog,
Adder's fork, and blind-worm's sting,
Lizard's leg, and owlet's wing,
For a charm of powerful trouble,
Like a hell-broth boil and bubble.
William Shakespeare