For example, Phidias makes a statue. Now the product of an art is one thing, and that of a trade is another. It is the business of the art to make the thing which he wished to make, and that of the trade to make it with a profit. Phidias has completed his work, even though he does not sell it. The product, therefore, of his work is threefold: there is the consciousness of having made it, which he receives when his work is completed; there is the fame which he receives; and thirdly, the advantage which he obtains by it, in influence, or by selling it, or otherwise. In like manner the first fruit of a benefit is the consciousness of it, which we feel when we have bestowed it upon the person whom we chose; secondly and thirdly there is the credit which we gain by doing so, and there are those things which we may receive in exchange for it. So when a benefit has been graciously received, the giver has already received gratitude, but has not yet received recompense for it: that which we owe in return is therefore something apart from the benefit itself, for we have paid for the benefit itself when we accept it in a grateful spirit.