G=R² is the formula we use at Ragpicker.org to describe the THE LAW OF GIVING - the simple universal law that to give not just to receive, but to give is to receive more.
Service can be compared to giving away a dollar to someone only to receive a dollar and change in return. Giving is an economy you cannot only live with, but one you can live better with!
Einstein is famous for his formula of E=mc² to define energy. Although he never reduced the Law of Giving to a formula it was clear that he understood it. In fact, he may have smartest of all when he stated: "Only a life lived for others is a life worthwhile."