There was a countryman who visits his goose, but this goose is a special one. The goose lays one golden egg each day.
The countryman took the golden egg to market to sell it. He soon became to get rich. Since the goose was only giving him one golden egg per day, he grew impatient because he wasn't getting rich fast enough.
The countryman thought that he could kill the goose to get all the golden eggs at once. So that's what he did. He cut open the goose, there was no golden eggs inside. Those who have plenty more and so lose all they have.