( Story told by Swami Vivekananda )
There was a certain king who had a huge number of courtiers, and each one of these courtiers declared he was ready to sacrifice his life for his master, and that he was the most sincere being ever born. In course of time, a Sannyâsin came to the king. The king said to him that there never was a king who had so many sincere courtiers as he had. The Sannyasin smiled and said he did not believe that. The king said the Sannyasin could test it if he liked.
So the Sannyasin declared that he would make a great sacrifice by which the king’s reign would be extended very long, with the condition that there should be made a small tank into which each one of his courtiers should pour a pitcher of milk, in the dark of night.
The king smiled and said, “Is this the test?” And he asked his courtiers to come to him, and told them what was to be done. They all expressed their joyful assent to the proposal and returned. In the dead of night, they came and emptied their pitchers into the tank. But in the morning, it was found full of water only. The courtiers were assembled and questioned about the matter. Each one of them had thought there would be so many pitchers of milk that his water would not be detected. Unfortunately most of us have the same idea and we do our share of work as did the courtiers in the story.
Source: The Complete Works of Swami Vivekananda/Volume 1/Lectures And Discourses/Vedanta And Privilege