(23) One, therefore, will give the definition of whatever he possesses the knowledge of; as one can by no means be acquainted with that which he cannot embrace and define in speech. And in consequence of ignorance of the definition, the result is, that many disputes and deceptions arise. For if he that knows the thing has the knowledge of it in his mind, and can explain by words what he conceives; and if the explanation of the thought is definition; then he that knows the thing must of necessity be able also to give the definition.

(6) 'That which cannot be seen, nor seized, which has no family and no caste, no eyes nor ears, no hands nor feet, the eternal, the omnipresent (all-pervading), infinitesimal, that which is imperishable, that it is which the wise regard as the source of all beings.'

(4) 'Wide apart and leading to different points are these two, ignorance, and what is known as wisdom. I believe Nakiketas to be one who desires knowledge, for even many pleasures did not tear thee away.'

(9) That subtle Self is to be known by thought (ketas) there where breath has entered fivefold, for every thought of men is interwoven with the senses, and when thought is purified, then the Self arises.

(3) 1. The knowledge of self. 2. The knowledge of God. 3. The knowledge of this world as it really is. 4. The knowledge of the next world as it really is. We shall now proceed to expound these four constituents in order.

(1) As, then, Knowledge (episthmh) is an intellectual state, from which results the act of knowing, and becomes apprehension irrefragable by reason; so also ignorance is a receding impression, which can be dislodged by reason. And that which is overthrown as well as that which is elaborated by reason, is in our power. Akin to Knowledge is experience, cognition (eidhsis), Comprehension (sunesis), perception, and Science. Cognition (eidhsis) is the knowledge of universals by species; and Experience is comprehensive knowledge, which investigates the nature of each thing. Perception (nohsis) is the knowledge of intellectual objects; and Comprehension (sunesis) is the knolwedge of what is compared, or a comparison that cannot be annulled, or the faculty of comparing the objects with which Judgment and Knowledge are occupied, both of one and each and all that goes to make up one reason. And Science (gnwsis) is the knowledge of the thing in itself, or the knowledge which harmonizes with what takes place. Truth is the knowledge of the true; and the mental habit of truth is the knowledge of the things which are true. Now knowledge is constituted by the reason, and cannot be overthrown by another reason. What we do not, we do not either from not being able, or not being willing - or both. Accordingly we don't fly, since we neither can nor wish; we do not swim at present, for example, since we can indeed, but do not choose; and we are not as the Lord, since we wish, but cannot be: "for no disciple is above his master, and it is sufficient if we be as the master:" not m essence (for it is impossible for that, which is by adoption, to be equal in substance to that, which is by nature); but [we are as Him] only in our having been made immortal, and our being conversant with the contemplation of realities, and beholding the Father through what belongs to Him.

(43) When the object dwells in the mind, clear of memory-pictures, uncoloured by the mind, as a pure luminous idea, this is perception without exterior or consideration.

(15) And Wisdom being manifold, pervading the whole world, and all human affairs, varies its appellation in each case. When it applies itself to first causes, it is called Understanding (nohsis). When, however, it confirms this by demonstrative reasoning, it is termed Knowledge, and Wisdom, and Science. When it is occupied in what pertains to piety, and receives without speculation the primal Word in consequence of the maintenance of the operation in it, it is called Faith. In the sphere of things of sense, establishing that which appears as being truest, it is Right Opinion. In operations, again, performed by skill of hand, it is Art But when, on the other hand, without the study of primary causes, by the observation of similarities, and by transposition, it makes any attempt or combination, it is called Experiment. But belonging to it, and supreme and essential, is the Holy Spirit, which above all he who, in consequence of [divine] guidance, has believed, receives after strong faith.

(27) For it is the contraction, compacting or imaging of a thing, and therefore it is the first quality, and a beginning of the angelical creatures, and of all images or likenesses which are in heaven, and all which are in this world, and all whatsoever that can be named or expressed.

(41) Thou must not think that there is any other power or virtue in it, or belonging to it, than there is in the whole deep of the body everywhere, all over.

(2) Farther still, to the former that which is highest and that which is incomprehensible pertain, and also that which is better than all measure, and is in such a manner formless, as not to be circumscribed by any form; but the latter is vanquished by inclination, habitude, and propensity; and is detained by appetites directed to that which is less excellent, and by familiarity with secondary natures. Hence, in the last place, it is formalized by all-various measures derived from them. Intellect, therefore, which is the leader and king of all beings, and which is the demiurgic art of the universe, is always present with the Gods with invariable sameness, perfectly, and without indigence, being purely established in itself, according to one energy. But soul participates of a partible and multiform intellect, having its attention directed to the government of the whole. It also providentially attends to inanimate natures, becoming at different times ingenerated in different forms.

(4) If a person knew the Soul (Atman), With the thought "I am he!" With what desire, for love of what Would he cling unto the body?

(4) [...] [...] [...] [...] [...] [...] [...] [...] [...] [...] ... [...] [...] knowledge."

(5) Those to whom existence comes about by chance and automatic action and is held together by material forces have drifted far from God and from the concept of unity; we are not here addressing them but only such as accept another nature than body and have some conception of soul.

Soul must be sounded to the depths, understood as an emanation from Intellectual-Principle and as holding its value by a Reason-Principle thence infused. Next this Intellect must be apprehended, an Intellect other than the reasoning faculty known as the rational principle; with reasoning we are already in the region of separation and movement: our sciences are Reason-Principles lodged in soul or mind, having manifestly acquired their character by the presence in the soul of Intellectual-Principle, source of all knowing.

Thus we come to see Intellectual-Principle almost as an object of sense: the Intellectual Kosmos is perceptible as standing above soul, father to soul: we know Intellectual-Principle as the motionless, not subject to change, containing, we must think, all things; a multiple but at once indivisible and comporting difference. It is not discriminate as are the Reason-Principles, which can in fact be known one by one: yet its content is not a confusion; every item stands forth distinctly, just as in a science the entire content holds as an indivisible and yet each item is a self-standing verity.

Now a plurality thus concentrated like the Intellectual Kosmos is close upon The First- and reason certifies its existence as surely as that of soul- yet, though of higher sovereignty than soul, it is not The First since it is not a unity, not simplex as unity, principle over all multiplicity, must be.

Before it there is That which must transcend the noblest of the things of Being: there must be a prior to this Principle which aiming towards unity is yet not unity but a thing in unity's likeness. From this highest it is not sundered; it too is self-present: so close to the unity, it cannot be articulated: and yet it is a principle which in some measure has dared secession.

That awesome Prior, The Unity, is not a being, for so its unity would be vested in something else: strictly no name is apt to it, but since name it we must there is a certain rough fitness in designating it as unity with the understanding that it is not the unity of some other thing.

Thus it eludes our knowledge, so that the nearer approach to it is through its offspring, Being: we know it as cause of existence to Intellectual-Principle, as fount of all that is best, as the efficacy which, self-perduring and undiminishing, generates all beings and is not to be counted among these its derivatives, to all of which it must be prior.

This we can but name The Unity, indicating it to each other by a designation that points to the concept of its partlessness while we are in reality striving to bring our own minds to unity. We are not to think of such unity and partlessness as belong to point or monad; the veritable unity is the source of all such quantity which could not exist unless first there existed Being and Being's Prior: we are not, then, to think in the order of point and monad but to use these- in their rejection of magnitude and partition- as symbols for the higher concept.

(4) But we, too, are king when we are moulded to the Intellectual-Principle.

That correspondence may be brought about in two ways: either the radii from that centre are traced upon us to be our law or we are filled full of the Divine Mind, which again may have become to us a thing seen and felt as a presence.

Hence our self-knowing comes to the knowing of all the rest of our being in virtue of this thing patently present; or by that power itself communicating to us its own power of self-knowing; or by our becoming identical with that principle of knowledge.

Thus the self-knower is a double person: there is the one that takes cognisance of the principle in virtue of which understanding occurs in the soul or mind; and there is the higher, knowing himself by the Intellectual-Principle with which he becomes identical: this latter knows the self as no longer man but as a being that has become something other through and through: he has thrown himself as one thing over into the superior order, taking with him only that better part of the soul which alone is winged for the Intellectual Act and gives the man, once established There, the power to appropriate what he has seen.

We can scarcely suppose this understanding faculty to be unaware that it has understanding; that it takes cognisance of things external; that in its judgements it decides by the rules and standards within itself held directly from the Intellectual-Principle; that there is something higher than itself, something which, moreover, it has no need to seek but fully possesses. What can we conceive to escape the self-knowledge of a principle which admittedly knows the place it holds and the work it has to do? It affirms that it springs from Intellectual-Principle whose second and image it is, that it holds all within itself, the universe of things, engraved, so to say, upon it as all is held There by the eternal engraver. Aware so far of itself, can it be supposed to halt at that? Are we to suppose that all we can do is to apply a distinct power of our nature and come thus to awareness of that Intellectual-Principle as aware of itself? Or may we not appropriate that principle- which belongs to us as we to it- and thus attain to awareness, at once, of it and of ourselves? Yes: this is the necessary way if we are to experience the self-knowledge vested in the Intellectual-Principle. And a man becomes Intellectual-Principle when, ignoring all other phases of his being, he sees through that only and sees only that and so knows himself by means of the self- in other words attains the self-knowledge which the Intellectual-Principle possesses.

(47) When pure perception without judicial action of the mind is reached, there follows the gracious peace of the inner self.

(10) The Person is all this, sacrifice, penance, Brahman, the highest immortal; he who knows this hidden in the cave (of the heart), he, O friend, scatters the knot of ignorance here on earth.

(27) Accordingly, while the definition is explanatory of the essence of the thing, it is incapable of accurately comprehending its nature. By means of the principal species, the definition makes an exposition of the essence, and almost has the essence in the quality.

(9) It follows that in the cases specified above- agent, knowledge and the rest- the relation must be considered as in actual operation, and the Act and the Reason-Principle in the Act must be assumed to be real: in all other cases there will be simply participation in an Ideal-Form, in a Reason-Principle.

If Reality implied embodiment, we should indeed be forced to deny Reality to these conditions called relative; if however we accord the pre-eminent place to the unembodied and to the Reason-Principles, and at the same time maintain that relations are Reason-Principles and participate in Ideal-Forms, we are bound to seek their causes in that higher sphere. Doubleness, it is clear, is the cause of a thing being double, and from it is derived halfness.

Some correlatives owe their designations to the same Form, others to opposite Forms; it is thus that two objects are simultaneously double and half of each other, and one great and the other small. It may happen that both correlatives exist in one object-likeness and unlikeness, and, in general, identity and difference, so that the same thing will be at once like and unlike, identical and different.

The question arises here whether sharing in the same Form could make one man depraved and another more depraved. In the case of total depravity, clearly the two are made equal by the absence of a Form. Where there is a difference of degree, the one has participated in a Form which has failed to predominate, the other in a Form which has failed still more: or, if we choose the negative aspect, we may think of them both as failing to participate in a Form which naturally belonged to them.

Sensation may be regarded as a Form of double origin ; and similarly with knowledge.

Habit is an Act directed upon something had and binding it as it were with the subject having , as the Act of production binds producer and product.

Measurement is an Act of the measurer upon the measured object: it too is therefore a kind of Reason-Principle.

Now if the condition of being related is regarded as a Form having a generic unity, Relation must be allowed to be a single genus owing its reality to a Reason-Principle involved in all instances. If however the Reason-Principles stand opposed and have the differences to which we have referred, there may perhaps not be a single genus, but this will not prevent all relatives being expressed in terms of a certain likeness and falling under a single category.

But even if the cases of which we have spoken can be subsumed under a single head, it is nevertheless impossible to include in a single genus all that goes with them in the one common category: for the category includes negations and derivatives- not only, for example, double but also its negative, the resultant doubleness and the act of doubling. But we cannot include in one genus both the thing and its negative- double and not-double, relative and not-relative- any more than in dealing with the genus animal we can insert in it the nonanimal. Moreover, doubleness and doubling have only the relation to double that whiteness has to white; they cannot be classed as identical with it.

(46) Timaeus: the Form of the Most Good; but by the most of men they are supposed to be not auxiliary but primary causes of all things—cooling and heating, solidifying and dissolving, and producing all such effects. Yet they are incapable of possessing reason and thought for any purpose. For, as we must affirm, the one and only existing thing which has the property of acquiring thought is Soul; and Soul is invisible, whereas fire and water and earth and air are all visible bodies; and the lover of thought and knowledge must needs pursue first