But the real cause, it would seem, rests upon nature, and the case is not parallel to that of creditors; because in this there is no affection to the persons, but merely a wish for their preservation with a view to the return: whereas, in point of fact, they who have done kindnesses feel friendship and love for those to whom they have done them, even though they neither are, nor can by possibility hereafter be, in a position to serve their benefactors.