THERE is a natural tendency, a powerful urge inside us all, called reprocity, meaning that when you do something to help someone else, they will naturally want to help you and others.
The idea spans all faiths and religions, and is a very powerful force. Reciprocity is the reason your wife or partner keeps a mental list of everyone you have entertained for dinner, and who has not invited you back…a list that goes back many years! Recipocity is also when you drop someone off your Christmas card list, and then, with a day to go, you receive a card from them, forcing you to race around finding any old card before trying to make the post on time.
If it’s any consolation, thousands of others are doing exactly the same. Reciprocity is everywhere, and within everyone.
(Extract from The Naked Millionaire)