Since therefore of goods, some are eligible for their own sakes, and not for the sake of another thing; but others are eligible for the sake of something else, and not on their own account; there is also a certain third species of goods, which is eligible both on its own account, and for the sake of another thing. What, therefore, is the good which is eligible on its own account, and not for the sake of something else? It is evident that it is felicity. For we aspire after other things for the sake of this, but we do not desire this for the sake of any thing else. Again, what are those goods which we desire indeed for the sake of something else, but which we do not desire on their own account? It is evident they are such things as are useful, and pre-eligible goods, which become the causes of our obtaining things which are eligible [on their own account]; such as corporeal labors, exercise, and frictions which are employed for the sake of a good habit of body; and also reading, meditation, and study, which are undertaken for the sake of things beautiful and virtue. But what are the things which are eligible on their own account, and also for the sake of something else? They are such things as the virtues, and the habits of them, deliberate choice and actions, and whatever adheres to that which is really beautiful. Hence, that indeed which is eligible on its own account, and not on account of something else, is a solitary good and one. But that which is eligible for its own sake, and for the sake of another thing, is triply divided. For one part of it indeed subsists about the soul; another about the body; and another pertains to externals. And that which is about the soul, consists of the virtues of the soul; that which is about the body, of the virtues of the body; and that which pertains to externals, consists of friends, glory, honor, and wealth. There is likewise a similar reasoning with respect to that which is eligible on account of something else. For one part of it indeed is effective of the goods of the soul; another part of it, of the goods of the body; and that which pertains to externals is the cause of wealth, glory, honor, and friendship. That virtue however happens to be eligible for its own sake, is evident from the following considerations. For if things which are naturally subordinate, I mean the goods of the body, are eligible for their own sakes, but the soul is better than the body, it is evident that we love the goods of the soul on their own account, and not for the sake of the consequences with which they are attended.