A man came upon an apricot tree, whose grounds were surrounded by its own fruit, yet whose branches were still full of apricots. This man filled his bags with all the apricots from the ground saying to himself, this is more than I need, but what could be the harm in that? A second man came upon the apricot tree and saw that it was full of fruit. He climbed the tree and filled his bags with all the low hanging fruit. This second man then told himself, "This is more than I need, but what could be the harm in that?"A third man came upon the apricot tree and saw that it only had fruit upon its high branches. In order to get the apricots safely, he chopped down the tree and filled his bag with the last of the fruit. This third man then told himself, "This is more than I need, but what could be the harm in that?" 
Do not take more than you need because it will lead to others not being able to have what they need. 