1 of 1 in Book VI, Chapter III142 of 276 in work
Now entering Book VI, Chapter III
Knowledge of Necessity
Aristotle
Nicomachean Ethics

Aristotle defines true knowledge as the understanding of things that are necessary and eternal, distinguishing it from the uncertainty of observing things that can change.

...e work of both the Intellectual Parts of the Soul; those states therefore are the Excellences of each in which each will best attain truth. Chapter III. Commencing then from the point stated above we will now speak of these Excellences again. Let those faculties whereby the Soul attains truth in Affirmation or Negation, be assumed to be in number five:[10] viz. Art, Knowledge, Practical Wisdom, Science, Intuition: (Supposition and Opinion I do not include, because by these one may go wrong.)
What Knowledge is, is plain from the following of considerations, if one is to speak accurately, instead of being led away by resemblances. For we all conceive that what we strictly speaking know, cannot be otherwise than it is, because as to those things which can be otherwise than they are, we are uncertain whether they are or are not, the moment they cease to be within the sphere of our actual observation. So then, whatever comes within the range of Knowledge is by necessity, and therefore eternal, (because all things are so which exist necessarily,) and all eternal things are without beginning, and indestructible.
Again, all Knowledge is thought to be capable of being taught, and what comes within its range capable of being learned. And all teaching is based upon previous knowledge; (a statement you will find in the Analytics also,)[11] for there are two ways of teaching, by Syllogism and by Induction. In fact. Induction is the source of universal propositions, and Syllogism reasons from these universals.[12] Syllogism then may reason from principles which cannot be themselves proved Syllogistically: an...
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1 of 1 in Book VI, Chapter IV143 of 276 in work
Now entering Book VI, Chapter IV
Art's Domain of Making
Aristotle
Nicomachean Ethics

The author distinguishes Art as a productive process concerned with things that can be otherwise, separating it from natural necessity and moral action.

...tinct from that also conjoined with Reason, which is apt to Make: and for this reason they are not included one by the other, that is, Doing is not Making, nor Making Doing.[14] Now[15] as Architecture is an Art, and is the same as “a certain state of mind, conjoined with Reason, which is apt to Make,” and as there is no Art which is not such a state, nor any such state which is not an Art, Art, in its strict and proper sense, must be “a state of mind, conjoined with true Reason, apt to Make.”
Now all Art has to do with production, and contrivance, and seeing how any of those things may be produced which may either be or not be, and the origination of which rests with the maker and not with the thing made. And, so neither things which exist or come into being necessarily, nor things in the way of nature, come under the province of Art, because these are self-originating. And since Making and Doing are distinct, Art must be concerned with the former and not the latter.
And in a certain sense Art and Fortune are concerned with the same things, as, Agathon says by the way, “Art Fortune loves, and is of her beloved.” So Art, as has been stated, is “a certain state of mind, apt to Make, conjoined with true Reason;” its absence, on the contrary, is the same state conjoined with false Reason, and both are employed upon Contingent matter. Chapter V. As for Practical Wisdom, we shall ascertain its nature by examining to what kind of persons we in common language...
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1 of 2 in Book VI, Chapter V144 of 276 in work
Now entering Book VI, Chapter V
Deliberation Without Rules
Aristotle
Nicomachean Ethics

Practical wisdom is defined as the ability to deliberate effectively about what is conducive to living well in a general sense.

...sense Art and Fortune are concerned with the same things, as, Agathon says by the way, “Art Fortune loves, and is of her beloved.” So Art, as has been stated, is “a certain state of mind, apt to Make, conjoined with true Reason;” its absence, on the contrary, is the same state conjoined with false Reason, and both are employed upon Contingent matter. Chapter V. As for Practical Wisdom, we shall ascertain its nature by examining to what kind of persons we in common language ascribe it.[16]
It is thought then to be the property of the Practically Wise man to be able to deliberate well respecting what is good and expedient for himself, not in any definite line, as what is conducive to health or strength, but what to living well. A proof of this is that we call men Wise in this or that, when they calculate well with a view to some good end in a case where there is no definite rule. And so, in a general way of speaking, the man who is good at deliberation will be Practically Wise.
Now no man deliberates respecting things which cannot be otherwise than they are, nor such as lie not within the range of his own action: and so, since Knowledge requires strict demonstrative reasoning, of which Contingent matter does not admit (I say Contingent matter, because all matters of deliberation must be Contingent and deliberation cannot take place with respect to things which are Necessarily), Practical Wisdom cannot be Knowledge nor Art; nor the former, because what falls under the...
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2 of 2 in Book VI, Chapter V145 of 276 in work
Vice's Blinding Effect
Aristotle
Nicomachean Ethics

The author argues that vice destroys the perception of moral principles, necessitating practical wisdom to maintain a focus on the 'final cause' of human good.

...the reason why we call the habit of perfected self-mastery by the name which in Greek it bears, etymologically signifying “that which preserves the Practical Wisdom:” for what it does preserve is the Notion I have mentioned, i.e. of one’s own true interest.[18] For it is not every kind of Notion which the pleasant and the painful corrupt and pervert, as, for instance, that “the three angles of every rectilineal triangle are equal to two right angles,” but only those bearing on moral action.
For the Principles of the matters of moral action are the final cause of them: now to the man who has been corrupted by reason of pleasure or pain the Principle immediately becomes obscured, nor does he see that it is his duty to choose and act in each instance with a view to this final cause and by reason of it: for viciousness has a tendency to destroy the moral Principle: and so Practical Wisdom must be “a state conjoined with reason, true, having human good for its object, and apt to do.”
Then again Art admits of degrees of excellence, but Practical Wisdom does not:[20] and in Art he who goes wrong purposely is preferable to him who does so unwittingly,[21] but not so in respect of Practical Wisdom or the other Virtues. It plainly is then an Excellence of a certain kind, and not an Art. Now as there are two parts of the Soul which have Reason, it must be the Excellence of the Opinionative [which we called before calculative or deliberative], because both Opinion and Practical...
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1 of 1 in Book VI, Chapter VII146 of 276 in work
Now entering Book VI, Chapter VII
Science's Intuitive Foundation
Aristotle
Nicomachean Ethics

The author defines science as the most accurate form of knowledge, requiring both an understanding of first principles and an intuition of the most precious objects in the universe.

...ighest accuracy;[22] Phidias, for instance, we call a Scientific or cunning sculptor; Polycleitus a Scientific or cunning statuary; meaning, in this instance, nothing else by Science than an excellence of art: in the other sense, we think some to be Scientific in a general way, not in any particular line or in any particular thing, just as Homer says of a man in his Margites; “Him the Gods made neither a digger of the ground, nor ploughman, nor in any other way Scientific.” So it is plain that
Science must mean the most accurate of all Knowledge; but if so, then the Scientific man must not merely know the deductions from the First Principles but be in possession of truth respecting the First Principles. So that Science must be equivalent to Intuition and Knowledge; it is, so to speak, Knowledge of the most precious objects, with a head on. I say of the most precious things, because it is absurd to suppose πολιτικὴ, or Practical Wisdom, to be the highest, unless it can be shown that Man is the most excellent of all that exists in the Universe.
Now if “healthy” and “good” are relative terms, differing when applied to men or to fish, but “white” and “straight” are the same always, men must allow that the Scientific is the same always, but the Practically Wise varies: for whatever provides all things well for itself, to this they would apply the term Practically Wise, and commit these matters to it; which is the reason, by the way, that they call some brutes Practically Wise, such that is as plainly have a faculty of forethought respect...
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