(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 .

(12) If then we do not propose to divide Quality in this manner, what basis of division have we?

We must examine whether qualities may not prove to be divisible on the principle that some belong to the body and others to the soul. Those of the body would be subdivided according to the senses, some being attributed to sight, others to hearing and taste, others to smell and touch. Those of the soul would presumably be allotted to appetite, emotion, reason; though, again, they may be distinguished by the differences of the activities they condition, in so far as activities are engendered by these qualities; or according as they are beneficial or injurious, the benefits and injuries being duly classified. This last is applicable also to the classification of bodily qualities, which also produce differences of benefit and injury: these differences must be regarded as distinctively qualitative; for either the benefit and injury are held to be derived from Quality and the quale, or else some other explanation must be found for them.

A point for consideration is how the quale, as conditioned by Quality, can belong to the same category: obviously there can be no single genus embracing both.

Further, if "boxer" is in the category of Quality, why not "agent" as well? And with agent goes "active." Thus "active" need not go into the category of Relation; nor again need "passive," if "patient" is a quale. Moreover, agent" is perhaps better assigned to the category of Quality for the reason that the term implies power, and power is Quality. But if power as such were determined by Substance , the agent, though ceasing to be a quale, would not necessarily become a relative. Besides, "active" is not like "greater": the greater, to be the greater, demands a less, whereas "active" stands complete by the mere possession of its specific character.

It may however be urged that while the possession of that character makes it a quale, it is a relative in so far as it directs upon an external object the power indicated by its name. Why, then, is not "boxer" a relative, and "boxing" as well? Boxing is entirely related to an external object; its whole theory pre-supposes this external. And in the case of the other arts- or most of them- investigation would probably warrant the assertion that in so far as they affect the soul they are qualities, while in so far as they look outward they are active and as being directed to an external object are relatives. They are relatives in the other sense also that they are thought of as habits.

Can it then be held that there is any distinct reality implied in activity, seeing that the active is something distinct only according as it is a quale? It may perhaps be held that the tendency towards action of living beings, and especially of those having freewill, implies a reality of activity .

But what is the function of the active in connection with those non-living powers which we have classed as qualities? Doubtless to recruit any object it encounters, making the object a participant in its content.

But if one same object both acts and is acted upon, how do we then explain the active? Observe also that the greater- in itself perhaps a fixed three yards' length- will present itself as both greater and less according to its external contacts.

It will be objected that greater and less are due to participation in greatness and smallness; and it might be inferred that a thing is active or passive by participation in activity or passivity.

This is the place for enquiring also whether the qualities of the Sensible and Intellectual realms can be included under one head- a question intended only for those who ascribe qualities to the higher realm as well as the lower. And even if Ideal Forms of qualities are not posited, yet once the term "habit" is used in reference to Intellect, the question arises whether there is anything common to that habit and the habit we know in the lower.

Wisdom too is generally admitted to exist There. Obviously, if it shares only its name with our wisdom, it is not to be reckoned among things of this sphere; if, however, the import is in both cases the same, then Quality is common to both realms- unless, of course, it be maintained that everything There, including even intellection, is Substance.

This question, however, applies to all the categories: are the two spheres irreconcilable, or can they be co-ordinated with a unity?

(43) The perfection of the powers of the bodily vesture comes through the wearing away of impurities, and through fervent aspiration.

(10) Besides, in addition to these ten human parts, the law appear to give its injunctions to sight, and hearing, and Smell, and touch, and taste, and to the organs subservient to these, which are double - the hands and the feet. For such is the formation of man. And the soul is introduced, and previous to it the ruling faculty, by which we re.on, not produced in procreation; so that without it there is made up the number ten, of the faculties by which all the activity of man is carried out. For in order, straightway on man's entering existence, his life begins with sensations. We accordingly assert that rational and ruling power is the cause of the constitution of the living creature; also that this, the irrational part, is animated, and is a part of it. Now the vital force, in which is comprehended the power of nutrition and growth, and generally of motion, is assigned to the carnal spirit, which has great susceptibility of motion, and passes in all directions through the senses and the rest of the body, and through the body is the primary subject of sensations. But the power of choice, in which investigation, and study, and knowledge, reside, belongs to the ruling faculty. But all the faculties are placed in relation to one - the ruling faculty: it is through that man lives, and lives in a certain way.

(8) A. There are those who insist on the activities observed in bodies- warming, chilling, thrusting, pressing- and class soul with body, as it were to assure its efficacy. This ignores the double fact that the very bodies themselves exercise such efficiency by means of the incorporeal powers operating in them, and that these are not the powers we attribute to soul: intellection, perception, reasoning, desire, wise and effective action in all regards, these point to a very different form of being.

In transferring to bodies the powers of the unembodied, this school leaves nothing to that higher order. And yet that it is precisely in virtue of bodiless powers that bodies possess their efficiency is clear from certain reflections:

It will be admitted that quality and quantity are two different things, that body is always a thing of quantity but not always a thing of quality: matter is not qualified. This admitted, it will not be denied that quality, being a different thing from quantity, is a different thing from body. Obviously quality could not be body when it has not quantity as all body must; and, again, as we have said, body, any thing of mass, on being reduced to fragments, ceases to be what it was, but the quality it possessed remains intact in every particle- for instance the sweetness of honey is still sweetness in each speck- this shows that sweetness and all other qualities are not body.

Further: if the powers in question were bodies, then necessarily the stronger powers would be large masses and those less efficient small masses: but if there are large masses with small while not a few of the smaller masses manifest great powers, then the efficiency must be vested in something other than magnitude; efficacy, thus, belongs to non-magnitude. Again; Matter, they tell us, remains unchanged as long as it is body, but produces variety upon accepting qualities; is not this proof enough that the entrants are Reason-Principles and not of the bodily order?

They must not remind us that when pneuma and blood are no longer present, animals die: these are necessary no doubt to life, but so are many other things of which none could possibly be soul: and neither pneuma nor blood is present throughout the entire being; but soul is.

(3) For that, in order that a man should be complete in either part, observe that he hath been composed of elements of either part in sets of four;—with hands, and feet, both of them pairs, and with the other members of his body, by means of which he may do service to the lower (that is to say the terrene) world. And to these parts [are added other] four;—of sense, and soul, of memory, and foresight, by means of which he may become acquainted with the rest of things divine, and judge of them. Hence it is brought about that man investigates the differences and qualities, effects and quantities of things, with critical research; yet, as he is held back with the too heavy weight of body’s imperfection, he cannot properly descry the causes of the nature of [all] things which [really] are the true ones.

(64) Continuing: "Philosophers say there is no true solution of the body without a proceeding coagulation of the spirit, for they are interchangeably mixed in a due proportion, whereby the bodily essence becomes of a spiritual penetrating nature. On the other hand, the incomprehensible spiritual essential virtue is also made corporeal by the fire, because there is made between them so near a relation or friendship, like as the heavens operate to the very Depth of Earth, and producing from thence all the treasures and riches of the whole World.

(21) That this is the phase of the human being in which desire takes its origin is shown by observation of the different stages of life; in childhood, youth, maturity, the bodily desires differ; health or sickness also may change them, while the faculty is of course the same through all: the evidence is clear that the variety of desire in the human being results from the fact that he is a corporeal entity, a living body subject to every sort of vicissitude.

The total movement of desire is not always stirred simultaneously with what we call the impulses to the satisfaction even of the lasting bodily demands; it may refuse assent to the idea of eating or drinking until reason gives the word: this shows us desire- the degree of it existing in the living body- advancing towards some object, with Nature refusing its co-operation and approval, and as sole arbiter between what is naturally fit and unfit, rejecting what does not accord with the natural need.

We may be told that the changing state of the body is sufficient explanation of the changing desires in the faculty; but that would require the demonstration that the changing condition of a given entity could effect a change of desire in another, in one which cannot itself gain by the gratification; for it is not the desiring faculty that profits by food, liquid, warmth, movement, or by any relief from overplenty or any filling of a void; all such services touch the body only.

(18) Man has been truly termed a "microcosm," or little world in himself and the structure of his body should be studied not only by those who wish to become doctors, but by those who wish to attain to a more intimate knowledge of God, just as close study of the niceties and shades of language in a great poem reveals to us more and more of the genius of its author.

(5) Universally therefore, virtue is a certain co-adaptation of the irrational parts of the soul to the rational part. Virtue however, is produced through pleasure and pain receiving the boundary of that which is fit. For true virtue is nothing else than the habit of that which is fit. But the fit, or the decorous, is that which ought to be; and the unfit, or indecorous, is that which ought not to be. Of the indecorous however, there are two species, viz. excess and defect. And excess indeed, is more than is fit; but defect is less than is fit. But since the fit is that which ought to be, it is both a summit and a middle. It is a summit indeed, because it neither requires ablation, nor addition; but it is a middle, because it subsists between excess and defect.

The fit, however, and the unfit, are to each other as the equal and the unequal that which is arranged, and that which is without arrangement; and both the two former and the two latter are finite and infinite. On this account, the parts of the unequal are referred to the middle, but not to each other. For the angle is called obtuse which is greater than a right angle; but that is called acute, which is less than a right angle. The right line also [in a circle] is greater, which surpasses that which is drawn from the center. And the day is longer indeed, which exceeds that of the equinox. Diseases, likewise, of the body are generated, through the body becoming more hot or more cold [than is proper].

For that which is more hot [than is fit] exceeds moderation; and that which is more cold [than is fit] is below mediocrity. The soul also, and such things as pertain to it, have this disposition and analogy. For audacity indeed, is an excess of the decorous in the endurance of things of a dreadful nature; but timidity is a deficiency of the, decorous. And prodigality is an excess of what is fit in the expenditure of money; but illiberality is a deficiency in this. And rage indeed, is an excess of the decorous in the impulse of the irascible part of the soul; but insensibility is a deficiency of this. The same reasoning likewise applies to the opposition of the other dispositions of the soul.

It is necessary however, that virtue, since it is a habit of the decorous, and a medium of the passions, should neither be [wholly] impassive, nor immoderately passive. For impassivity indeed, causes the soul to be unimpelled, and to be without an enthusiastic tendency to the beautiful in conduct; but immoderate passivity causes it to be full of perturbation, and inconsiderate. It is necessary therefore, that passion should so present itself to the view, in virtue, as shadow and outline in a picture. For the animated and the delicate, and that which imitates the truth, in conjunction with goodness of colors, are especially effected in a picture through these [i. e. through shadow and outline]. But the passions of the soul are animated by the natural incitation and enthusiasm of virtue.

For virtue is generated from the passions, and when generated, again subsists together with them; just as that which is well harmonized consists of the sharp and the flat, that which is well mingled consists of the hot and the cold, and that which is in equilibrium derives its equality of weight from the heavy and the light. It is not therefore necessary to take away the passions of the soul; for neither would this be profitable; but it is requisite that they should be co-harmonized with the rational part, in conjunction with fitness and mediocrity.

(4) If we had to ascertain the nature of body and the place it holds in the universe, surely we should take some sample of body, say stone, and examine into what constituents it may be divided. There would be what we think of as the substrate of stone, its quantity- in this case, a magnitude; its quality- for example, the colour of stone. As with stone, so with every other body: we should see that in this thing, body, there are three distinguishable characteristics- the pseudo-substance, the quantity, the quality- though they all make one and are only logically trisected, the three being found to constitute the unit thing, body. If motion were equally inherent in its constitution, we should include this as well, and the four would form a unity, the single body depending upon them all for its unity and characteristic nature.

The same method must be applied in examining the Intellectual Substance and the genera and first-principles of the Intellectual sphere.

But we must begin by subtracting what is peculiar to body, its coming-to-be, its sensible nature, its magnitude- that is to say, the characteristics which produce isolation and mutual separation. It is an Intellectual Being we have to consider, an Authentic Existent, possessed of a unity surpassing that of any sensible thing.

Now the wonder comes how a unity of this type can be many as well as one. In the case of body it was easy to concede unity-with-plurality; the one body is divisible to infinity; its colour is a different thing from its shape, since in fact they are separated. But if we take Soul, single, continuous, without extension, of the highest simplicity- as the first effort of the mind makes manifest- how can we expect to find multiplicity here too? We believed that the division of the living being into body and soul was final: body indeed was manifold, composite, diversified; but in soul we imagined we had found a simplex, and boldly made a halt, supposing that we had come to the limit of our course.

Let us examine this soul, presented to us from the Intellectual realm as body from the Sensible. How is its unity a plurality? How is its plurality a unity? Clearly its unity is not that of a composite formed from diverse elements, but that of a single nature comprising a plurality.

This problem attacked and solved, the truth about the genera comprised in Being will thereby, as we asserted, be elucidated also.

(22) For each of the species is either an essence; as when we say, Some substances are corporeal and some incorporeal; or how much, or what relation, or where, or when, or doing, or suffering.

(15) And when the Taste has tried it, and if it be good for the Essences of the Soul, then it gives it to the Feeling, which must try what Quality it is of, whether hot or cold, hard or soft, thick or thin, and then the Feeling a sends it into the Heart, [presenting it] before the Flash of the Life, and before the King of the Light of Life; and the Will of the Mind pierces further into that Thing, a great Depth, and sees what is therein, [considering] how much it will receive and take in of that Thing, and when it is enough, then the Will gives it to the Spirit of the Soul, viz. to the eternal Emperor, who brings it (with his strong and austere Might) out of the Heart, in the Sound upon the Tongue under the Roof of the Mouth, and there the Spirit distinguishes according to the Senses, as the Will has discovered [or manifested] it, and the Tongue distinguishes it in the Noise.

(7) Now bodies matter [-made] are in diversity. Some are of earth, of water some, some are of air, and some of fire. But they are all composed; some are more [composite], and some are simpler. The heavier ones are more [composed], the lighter less so. It is the speed of Cosmos' Course that works the manifoldness of the kinds of births. For being a most swift Breath, it doth bestow their qualities on bodies together with the One Pleroma - that of Life.

(38) Whatever springs automatically from the All out of that distinctive life of its own, and, in addition to that self-moving activity, whatever is due to some specific agency- for example, to prayers, simple or taking the form of magic incantations- this entire range of production is to be referred, not to each such single cause, but to the nature of the thing produced .

All that forwards life or some other useful purpose is to be ascribed to the transmission characteristic of the All; it is something flowing from the major of an integral to its minor. Where we think we see the transmission of some force unfavourable to the production of living beings, the flaw must be found in the inability of the subject to take in what would serve it: for what happens does not happen upon a void; there is always specific form and quality; anything that could be affected must have an underlying nature definite and characterized. The inevitable blendings, further, have their constructive effect, every element adding something contributory to the life. Then again some influence may come into play at the time when the forces of a beneficent nature are not acting: the co-ordination of the entire system of things does not always allow to each several entity everything that it needs: and further we ourselves add a great deal to what is transmitted to us.

None the less all entwines into a unity: and there is something wonderful in the agreement holding among these various things of varied source, even of sources frankly opposite; the secret lies in a variety within a unity. When by the standard of the better kind among things of process anything falls short- the reluctance of its material substratum having prevented its perfect shaping under idea- it may be thought of as being deficient in that noble element whose absence brings to shame: the thing is a blend, something due to the high beings, an alloy from the underlying nature, something added by the self.

Because all is ever being knit, all brought to culmination in unity, therefore all events are indicated; but this does not make virtue a matter of compulsion; its spontaneity is equally inwoven into the ordered system by the general law that the things of this sphere are pendant from the higher, that the content of our universe lies in the hands of the diviner beings in whom our world is participant.

(20) As with bodily pain and pleasure so with the bodily desires; their origin, also, must be attributed to what thus stands midway, to that Nature we described as the corporeal.

Body undetermined cannot be imagined to give rise to appetite and purpose, nor can pure soul be occupied about sweet and bitter: all this must belong to what is specifically body but chooses to be something else as well, and so has acquired a restless movement unknown to the soul and by that acquisition is forced to aim at a variety of objects, to seek, as its changing states demand, sweet or bitter, water or warmth, with none of which it could have any concern if it remained untouched by life.

In the case of pleasure and pain we showed how upon distress follows the knowledge of it, and that the soul, seeking to alienate what is causing the condition, inspires a withdrawal which the member primarily affected has itself indicated, in its own mode, by its contraction. Similarly in the case of desire: there is the knowledge in the sensation and in the next lower phase, that described as the "Nature" which carries the imprint of the soul to the body; that Nature knows the fully formed desire which is the culmination of the less formed desire in body; sensation knows the image thence imprinted upon the Nature; and from the moment of the sensation the soul, which alone is competent, acts upon it, sometimes procuring, sometimes on the contrary resisting, taking control and paying heed neither to that which originated the desire nor to that which subsequently entertained it.

But why, thus, two phases of desire; why should not the body as a determined entity be the sole desirer?

Because there are two distinct things, this Nature and the body, which, through it, becomes a living being: the Nature precedes the determined body which is its creation, made and shaped by it; it cannot originate the desires; they must belong to the living body meeting the experiences of this life and seeking in its distress to alter its state, to substitute pleasure for pain, sufficiency for want: this Nature must be like a mother reading the wishes of a suffering child, and seeking to set it right and to bring it back to herself; in her search for the remedy she attaches herself by that very concern to the sufferer's desire and makes the child's experience her own.

In sum, the living body may be said to desire of its own motion in a fore-desiring with, perhaps, purpose as well; Nature desires for, and because of, that living body; granting or withholding belongs to another again, the higher soul.

(16) When each of the entities bound up with the pseudo-substance is taken apart from the rest, the name of Quality is given to that one among them, by which without pointing to essence or quantity or motion we signify the distinctive mark, the type or aspect of a thing- for example, the beauty or ugliness of a body. This beauty- need we say?- is identical in name only with Intellectual Beauty: it follows that the term "Quality" as applied to the Sensible and the Intellectual is necessarily equivocal; even blackness and whiteness are different in the two spheres.

But the beauty in the germ, in the particular Reason-Principle- is this the same as the manifested beauty, or do they coincide only in name? Are we to assign this beauty- and the same question applies to deformity in the soul- to the Intellectual order, or to the Sensible? That beauty is different in the two spheres is by now clear. If it be embraced in Sensible Quality, then virtue must also be classed among the qualities of the lower. But merely some virtues will take rank as Sensible, others as Intellectual qualities.

It may even be doubted whether the arts, as Reason-Principles, can fairly be among Sensible qualities; Reason-Principles, it is true, may reside in Matter, but "matter" for them means Soul. On the other hand, their being found in company with Matter commits them in some degree to the lower sphere. Take the case of lyrical music: it is performed upon strings; melody, which may be termed a part of the art, is sensuous sound- though, perhaps, we should speak here not of parts but of manifestations : yet, called manifestations, they are nonetheless sensuous. The beauty inherent in body is similarly bodiless; but we have assigned it to the order of things bound up with body and subordinate to it.

Geometry and arithmetic are, we shall maintain, of a twofold character; in their earthly types they rank with Sensible Quality, but in so far as they are functions of pure Soul, they necessarily belong to that other world in close proximity to the Intellectual. This, too, is in Plato's view the case with music and astronomy.

The arts concerned with material objects and making use of perceptible instruments and sense-perception must be classed with Sensible Quality, even though they are dispositions of the Soul, attendant upon its apostasy.

There is also every reason for consigning to this category the practical virtues whose function is directed to a social end: these do not isolate Soul by inclining it towards the higher; their manifestation makes for beauty in this world, a beauty regarded not as necessary but as desirable.

On this principle, the beauty in the germ, and still more the blackness and whiteness in it, will be included among Sensible Qualities.

Are we, then, to rank the individual soul, as containing these Reason-Principles, with Sensible Substance? But we do not even identify the Principles with body; we merely include them in Sensible Quality on the ground that they are connected with body and are activities of body. The constituents of Sensible Substance have already been specified; we have no intention whatever of adding to them Substance bodiless.

As for Qualities, we hold that they are invariably bodiless, being affections arising within Soul; but, like the Reason-Principles of the individual soul, they are associated with Soul in its apostasy, and are accordingly counted among the things of the lower realm: such affections, torn between two worlds by their objects and their abode, we have assigned to Quality, which is indeed not bodily but manifested in body.

But we refrain from assigning Soul to Sensible Substance, on the ground that we have already referred to Quality those affections of Soul which are related to body. On the contrary, Soul, conceived apart from affection and Reason-Principle, we have restored to its origin, leaving in the lower realm no substance which is in any sense Intellectual.

(2) For if they were as the habits of bodies, or as material forms, or were in some other way corporeal-formed, it would, perhaps, be possible for them to be changed together with the differences of bodies. But if they are separate from bodies, and essentially preexist unmingled with them, what reasonable distinction, produced from bodies, can be transferred to them? To which also may be added, that this assertion of yours makes bodies to be more excellent than the divine genera, since the former afford a seat to superior causes, and insert in them peculiarities essentially. He, therefore, who coarranges allotments, distributions, and consociations of governors with the governed, will evidently assign a principal authority to more excellent natures. For, because the presiding powers are such [as we have shown them to be], on this account they have such an allotment, and give to it an essential specific distinction, but they are not assimilated to the nature of their receptacles.

(18) There remains the question whether the body possesses any force of its own- so that, with the incoming of the soul, it lives in some individuality- or whether all it has is this Nature we have been speaking of, the superior principle which enters into relations with it.

Certainly the body, container of soul and of nature, cannot even in itself be as a soulless form would be: it cannot even be like air traversed by light; it must be like air storing heat: the body holding animal or vegetive life must hold also some shadow of soul; and it is body thus modified that is the seat of corporeal pains and pleasures which appear before us, the true human being, in such a way as to produce knowledge without emotion. By "us, the true human being" I mean the higher soul for, in spite of all, the modified body is not alien but attached to our nature and is a concern to us for that reason: "attached," for this is not ourselves nor yet are we free of it; it is an accessory and dependent of the human being; "we" means the master-principle; the conjoint, similarly is in its own way an "ours"; and it is because of this that we care for its pain and pleasure, in proportion as we are weak rather than strong, gripped rather than working towards detachment.

The other, the most honourable phase of our being, is what we think of as the true man and into this we are penetrating.

Pleasure and pain and the like must not be attributed to the soul alone, but to the modified body and to something intermediary between soul and body and made up of both. A unity is independent: thus body alone, a lifeless thing, can suffer no hurt- in its dissolution there is no damage to the body, but merely to its unity- and soul in similar isolation cannot even suffer dissolution, and by its very nature is immune from evil.

But when two distinct things become one in an artificial unity, there is a probable source of pain to them in the mere fact that they were inapt to partnership. This does not, of course, refer to two bodies; that is a question of one nature; and I am speaking of two natures. When one distinct nature seeks to associate itself with another, a different, order of being- the lower participating in the higher, but unable to take more than a faint trace of it- then the essential duality becomes also a unity, but a unity standing midway between what the lower was and what it cannot absorb, and therefore a troubled unity; the association is artificial and uncertain, inclining now to this side and now to that in ceaseless vacillation; and the total hovers between high and low, telling, downward bent, of misery but, directed to the above, of longing for unison.

(7) So likewise this Intelligence diffuses Its virtue multiplied among the stars. Itself revolving on its unity. Virtue diverse doth a diverse alloyage Make with the precious body that it quickens, In which, as life in you, it is combined. From the glad nature whence it is derived, The mingled virtue through the body shines, Even as gladness through the living pupil. From this proceeds whate'er from light to light Appeareth different, not from dense and rare: This is the formal principle that produces, According to its goodness, dark and bright."