Book 7.4
"This," say you, "is the very thing that I wanted! I have caught you! I shall be glad to see how you will extricate yourself from the toils into which you have fallen of your own accord. Tell me, if the wise man possesses everything, how can one give anything to a wise man? for even what you give him is his already. It is impossible, therefore, to bestow a benefit upon a wise man, if whatever is given him comes from his own store; yet you Stoics declare that it is possible to give to a wise man. I make the same inquiry about friends as well: for you say that friends own everything in common, and if so, no one can give anything to his friend, for he gives what his friend owned already in common with himself."
There is nothing to prevent a thing belonging to a wise man, and yet being the property of its legal owner. According to law everything in a state belongs to the king, yet all that property over which the king has rights of possession is parcelled out among individual owners, and each separate thing belongs to somebody: and so one can give the king a house, a slave, or a sum of money without being said to give him what was his already; for the king has rights over all these things, while each citizen has the ownership of them. We speak of the country of the Athenians, or of the Campanians, though the inhabitants divide them amongst themselves into separate estates; the whole region belongs to one state or another, but each part of it belongs to its own individual proprietor; so that we are able to give our lands to the state, although they are reckoned as belonging to the state, because we and the state own them in different ways. Can there be any doubt that all the private savings of a slave belong to his master as well as he himself? yet he makes his master presents. The slave does not therefore possess nothing, because if his master chose he might possess nothing; nor does what he gives of his own free will cease to be a present, because it might have been wrung from him against his will. As for how we are to prove that the wise man possesses all things, we shall see afterwards; for the present we are both agreed to regard this as true; we must gather together something to answer the question before us, which is, how any means remain of acting generously towards one who already possesses all things? All things that a son has belong to his father, yet who does not know that in spite of this a son can make presents to his father? All things belong to the gods; yet we make presents and bestow alms even upon the gods. What I have is not necessarily not mine because it belongs to you; for the same thing may belong both to me and to you.
"He to whom courtezans belong," argues our adversary, "must be a procurer: now courtezans are included in all things, therefore courtezans belong to the wise man. But he to whom courtezans belong is a procurer; therefore the wise man is a procurer." Yes! by the same reasoning, our opponents would forbid him to buy anything, arguing, "No man buys his own property. Now all things are the property of the wise man; therefore the wise man buys nothing." By the same reasoning they object to his borrowing, because no one pays interest for the use of his own money. They raise endless quibbles, although they perfectly well understand what we say.