The Wolf in Sheep-skin
A wolf was walking in the countryside. He found a sheep-skin spread on the ground. He thought, "If I wear this skin and get mixed up in the flock, the shepherd will not suspect me. At night, I will kill a stout sheep and then take him away with me".
The wolf covered himself with the sheep-skin and got mixed up with a flock of sheep. As he had expected, the shepherd took him as a sheep and shut him also in the pen. The wolf was waiting for the night.
The shepherd had a feast that night. He sent a servant to fetch a fat sheep. The servant saw the sheep-skin covered wolf by chance. That night, the guests had the wolf for supper.
MORAL : Evil thoughts have evil ends.