If there has been a give-and-take between certain persons that forges karmic and sanskaric ties between them and creates claims and counterclaims, they have to come together and carry on fresh dealings in order to meet these claims and counter- claims. That which a person gives with a selfish motive binds him in the same way as that which he takes with a sense of separateness. The transaction of give or take, which thus binds, need not be purely on a material plane in the form of exchange of goods or money, nor in the performing of some physical tasks. It could consist of the exchange of views or feelings.
-Discourses 7th Ed., p329