This is one of the many Aesop’s fables that one can relate to in any day and age.
One day a wolf was chased away from a farm for trying to steal some of the sheep for food. Later that week, the wolf came back to the farm hoping to find some food. He peeped inside the house and found the farmer and his family feasting on lamb roast.
“Aha!”, he thought. “If I were to do the same thing that the farmer and his family are doing now, I would be shunted and chased, or even killed for killing a weak, innocent lamb.”
Moral: We are quick to judge and condemn others for what they do, but see nothing wrong in doing so ourselves