There lived a lonely old man in the village. In the evenings the local boys used to play close to his house. The games were accompanied with loud cries.
The old man was done with it, so one evening he invited the boys into his house. He told them how much he likes listening to loud children voices, and promised to give each of them a dollar if they promise to come again tomorrow.
The boys came and played even more cheerfully and loudly. The old man paid them and promised to pay again the next time.
But the next evening instead of one dollar, the boys got 50 cents.
On the third evening the old man paid them only 10 cents and explained that he’s running out of money.
– Dear children, – he asked, – would you agree to come again tomorrow and just play?
Extremely disappointed, the boys said that they won’t come anymore. Is it worth losing so much energy for free?