Gratitude, self-Interest, and love

Gratitude is usually conceived as a uniquely appropriate response to goodwill. A grateful person is bound to reward an act of goodwill in some appropriately proportionate way. I argue that goodwill, when interpreted as love, should require no reward. Consequently, the idea of gratitude as a proportionate response to love is not intelligible. However, goodwill can also be understood merely as a disinterested concern. Such forms of goodwill are involved in reciprocal relationships. But gratitude has no place in these relationships either.