A man bestows a benefit upon me: I receive it just as he wished it to be received: then he gets at once what he wanted, and the only thing which he wanted, and therefore I have proved myself grateful. After this it remains for me to enjoy my own resources, with the addition of an advantage conferred upon me by one whom I have obliged; this advantage is not the remainder of an imperfect service, but an addition to a perfected service. 135