A Shepherd penning his sheep in the fold for the night was about to shut up a wolf with them, when his Dog perceiving the wolf said, “Master, how can you expect the sheep to be safe if you admit a wolf into the fold?”

Credits
Aesop was an ancient Greek storyteller, believed to have lived around the 6th century BCE, whose fables have been retold across cultures for over two millennia. His tales typically feature animals as stand-ins for human behaviour, delivering moral lessons with striking economy — and "The Shepherd and the Dog" is among his most compact, built around a single cautionary exchange.
