Marcus Aurelius describes this elegantly in his Meditations. He distinguishes between three types of people. The first type of people, after doing a deed of kindness to another, is quickly to demand the favor in return. The second type of people are not so quick to ask for a return of the favor, but privately think of the other as their debtor. The third type of people are just “like the vine which has produced grapes and looks for nothing else once it has borne its own fruit.”
