Kitap 9
7
But in cases where no agreement is come to as to the value of the service, if it is proffered for the recipient’s own sake, as has been said above,Cf. 8.13.2. no complaint arises, for a friendship based on virtue does not give rise to quarrels; and the return made should be in proportion to the intention of the benefactor, since intention is the measure of a friend, and of virtue. This is the principle on which it would seem that payment ought to be made to those who have imparted instruction in philosophy; for the value of their service is not measurable in money, and no honor paid them could be an equivalent, but no doubt all that can be expected is that to them, as to the gods and to our parents, we should make such return as is in our Power.
8
When on the other hand the gift is not disinterested but made with a view to a recompense, it is no doubt the best thing that a return should be made such as both parties concur in thinking to be what is due. But failing such concurrence, it would seem to be not only inevitable but just that the amount of the return should be fixed by the party that received the initial service, since the donor will have recovered what the recipient really owes when he has been paid the value of the service to him, or the sum that he would have been willing to pay as the price of the pleasure.
