The Thief And The Cock

A thief broke into a house. He found nothing but a cock. The thief grabbed the cock and took it away.

Later, when the thief was about to kill the cock, it begged the thief to let it go, claiming that he was useful to people because he woke them to go about their tasks in the dark. 

The thief said, 'All the more reason to kill you: when you wake them up, you prevent us from robbing their houses!'

Moral

The same action has different values to different people.