A farmer, whose corn always took the first prize at the state fair, had the habit of sharing his best corn seed with all the farmers in the neighbourhood.
When asked why, he said, “It is really a matter of self interest. The wind picks up the pollen and carries it from field to field. So if my neighbours grow inferior corn the cross-pollination brings down the quality of my own corn. That is why I am concerned that they plant only the very best.”
All that you give to others, you are giving to your self. It is in our own interest to be selfless. Life always comes round full circle. Whatever it is that you give today, shall come back to you one day.