A newspaper editor once offered a prize for the best answer to the question, "Who are the happiest people on earth?"
The four winning answers were the following:
1. A mother bathing her baby.
2. A craftsman, or an artist, whistling over a job well done;
3. A doctor who has finished a difficult operation and saved a human life ;
4. A little child building castles in the sand.
Notice that all four people had one thing in common. None of them was engaged in a selfish pursuit of pleasure. Each was absorbed in some task - that seemed important, and that caused him to forget himself.