(1) The order of the soul subsists in such a way, that one part of it is the reasoning power, another is anger, and another is desire. And the reasoning power, indeed, has dominion over knowledge; anger over impetus; and desire intrepidly rules over the appetitions of the soul. When therefore these three parts pass into one, and exhibit one appropriate composition, then virtue and concord are produced in the soul. But when they are divulsed from each other by sedition, then vice and discord are produced in the soul. It is necessary, however, that virtue should have these three things, viz. reason, power, and deliberate choice. The virtue, therefore, of the reasoning power of the soul is prudence; for it is a habit of judging and contemplating.

But the virtue of the irascible part, is fortitude; for it is a habit of resisting, and enduring things of a dreadful nature. And the virtue of the epithymetic or appetitive part is temperance; for it is a moderation and detention of the pleasures which arise through the body. But the virtue of the whole soul is justice. For men indeed become bad, either through vice, or through incontinence, or through a natural ferocity. But they injure each other, either through gain, or through pleasure, or through ambition. Vice, therefore, more appropriately belongs to the reasoning part of the soul. For prudence indeed is similar to art; but vice to pernicious art. For it invents contrivances for the purpose of acting unjustly.

But incontinence rather pertains to the appetitive part of the soul. For continence consists in subduing, and incontinence in not subduing pleasures. And ferocity pertains to the irascible part of the soul. For when some one, through acting ill from desire, is gratified not as a man should be, but as a wild beast, then a thing of this kind is denominated ferocity. The effects also of these dispositions are consequent to the things for the sake of which they are performed. For avarice is consequent to vice; but vice is consequent to the reasoning part of the soul. And ambition, indeed, follows from the irascible part; and this becoming excessive, generates ferocity. Again, pleasure pertains to the appetitive part; but this being sought after more vehemently, generates incontinence. Hence, since the acting unjustly is produced from so many causes, it is evident that acting justly is effected through an equal number of causes. For virtue, indeed, is naturally beneficent and profitable; but vice is productive of evil, and is noxious.

(2) Since, however, of the parts of the soul, one is the leader, but the other follows, and the virtues and the vices subsist about these, and in these; it is evident that with respect to the virtues also, some are leaders, others are followers, and others, are composed from these. And the leaders, indeed, are such as prudence; but the followers are such as fortitude and temperance; and the composites from these, are such as justice. The passions, however, are the matter of virtue; for the virtues subsist about, and in these. But of the passions, one is voluntary, but another is involuntary. And the voluntary, indeed, is pleasure; but the involuntary is pain. Men also, who have the political virtues, give intension and remission to these, co-harmonizing the other parts of the soul, to that part which possesses reason.

But the boundary of this co-adaptation, is for intellect not to be prevented from accomplishing its proper work, either by indigence, or excess. For that which is less excellent, is co-arranged for the sake of that which is more excellent. Thus in the world, every part that is always passive, subsists for the sake of that which is always moved. And in the conjunction of animals, the female subsists for the sake of the male. For the latter sows, generating a soul; but the former alone imparts matter to that which is generated. In the soul however, the irrational subsists for the sake of the rational part. For anger and desire are co-arranged in subserviency to the first part of the soul; the former as a certain satellite, and guardian of the body; but the latter as a dispensator and provident curator of necessary wants.

But intellect being established in the highest summit of the body, and having a prospect in that which is on all sides splendid and transparent, investigates the wisdom of [real] beings. And this is the work of it according to nature, viz. having investigated, and obtained the possession [of truth] to follow those beings who are more excellent and more honorable than itself. For the knowledge of things divine and most honorable, is the principle, cause, and rule of human blessedness .

(1) Every virtue is perfected, as was shown by us in the beginning, from reason, deliberate choice, and power. Each of these, however, is not by itself a part of virtue, but the cause of it. Such therefore, as have the intellective and gnostic part of virtue , are denominated skilful and intelligent; but such as have the ethical and pre-elective part of it, are denominated useful and equitable. Since however, man is naturally adapted to act unjustly from exciting causes; and these are three, the love of pleasure in corporeal enjoyments; avarice, in the accumulation of wealth; and ambition, in surpassing those that are equal and similar to him;—this being the case, it is necessary to know, that it is possible to oppose to these such things as procure fear, shame, and desire in men; viz. fear through the laws, shame through the Gods, and desire through the energies of reason. Hence, it is necessary that youth should be taught from the first to honor the Gods and the laws. For from these, it will be manifest, that every human work, and every kind of human life, by the participation of sanctity and piety, will sail prosperously [over the sea of generation].

(3) This also is evident, that [human] life becomes different from disposition and action. But it is necessary that the disposition should be either worthy or depraved; and that action should be attended either with felicity or misery. And a worthy disposition, indeed, participates of virtue; but a bad one of vice. With respect to actions, also, those that are prosperous are attended with felicity; (for they derive their completion through looking to reason) but those that are unfortunate, are attended with misery; for they are frustrated of the end. Hence, it is not only necessary to learn virtue, but also to possess and use it, either for security, or increase, [of property when it is too little] or, which is the greatest thing of all, for the emendation of families and cities.

For it is not only necessary to have the possession of things beautiful, but also the use of them. All these things, however, will take place, when a man lives in a city that uses equitable laws. And these, indeed, I say, are what is called the horn of Amalthea. For all things are contained in equitable legislation. And without this, the greatest good of human nature can neither be effected, nor, when effected, be increased and become permanent. For this comprehends in itself virtue, and the tendency to virtue; because excellent natures are generated according to it. Manners, likewise, studies, and laws, subsist through this in the most excellent condition; and besides these, rightly-deciding reason, and piety and sanctity towards the most honorable natures.

So that it is necessary that he who is to be happy, and whose life is to be prosperous, should live and die in a country governed by equitable laws, relinquishing all illegality. At the same time what has been said is attended with necessity. For man is a part of society, and hence from the same reasoning, will become entire and perfect, if he not only associates with others, but associates in a becoming manner. For some things are naturally adapted to subsist in many things, and not in one thing; others in one thing, and not in many; but others both in many, and in one thing, and on this account in one thing, because in many. For harmony, indeed, and symphony and number, are naturally adapted to be ingenerated in many things.

For nothing which makes a whole from these parts, is sufficient to itself. But acuteness of seeing and hearing, and swiftness of feet, subsist in one thing alone. Felicity, however, and the virtue of soul, subsist both in one thing and in many, in a whole, and in the universe. And on this account they subsist in one thing, because they also subsist in many: and they subsist in many, because they are inherent in a whole and in the universe. For the orderly distribution of the whole nature of things methodically arranges each particular. And the orderly distribution of particulars gives completion to the whole of things and to the universe. But this follows from the whole being naturally prior to the part, and not the part to the whole . For if the world was not, neither the sun nor the moon would exist, nor the planets, nor the fixed stars. But the world existing, each of these also exists.