The author defines the 'Chief Good' as the most final end—something chosen always for its own sake and never as a means to something else.
1 of 2 in Book I, Chapter IV13 of 276 in work
Now entering Book I, Chapter IV
The Final End
Aristotle
Nicomachean Ethics...ry victory, and in that of house-building a house, and in any other thing something else; in short, in every action and moral choice the End, because in all cases men do everything else with a view to this. So that if there is some one End of all things which are and may be done, this must be the Good proposed by doing, or if more than one, then these. Thus our discussion after some traversing about has come to the same point which we reached before. And this we must try yet more to clear up.
Now since the ends are plainly many, and of these we choose some with a view to others (wealth, for instance, musical instruments, and, in general, all instruments), it is clear that all are not final: but the Chief Good is manifestly something final; and so, if there is some one only which is final, this must be the object of our search: but if several, then the most final of them will be it. Now that which is an object of pursuit in itself we call more final than that which is so with a view to something else; that again which is never an object of choice with a view to something else than those which are so both in themselves and with a…
And of this nature Happiness is mostly thought to be, for this we choose always for its own sake, and never with a view to anything further: whereas honour, pleasure, intellect, in fact every excellence we choose for their own sakes, it is true (because we would choose each of these even if no result were to follow), but we choose them also with a view to happiness, conceiving that through their instrumentality we shall be happy: but no man chooses happiness with a view to them, nor in fact wi...
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2 of 2 in Book I, Chapter IV14 of 276 in work
⚖Happiness as Ultimate End

Aristotle
Nicomachean EthicsHappiness is identified as the ultimate end because it is the only thing chosen exclusively for its own sake, while all other virtues are chosen as means to achieve it.
...e object of our search: but if several, then the most final of them will be it. Now that which is an object of pursuit in itself we call more final than that which is so with a view to something else; that again which is never an object of choice with a view to something else than those which are so both in themselves and with a view to this ulterior object: and so by the term “absolutely final,” we denote that which is an object of choice always in itself, and never with a view to any other.
And of this nature Happiness is mostly thought to be, for this we choose always for its own sake, and never with a view to anything further: whereas honour, pleasure, intellect, in fact every excellence we choose for their own sakes, it is true (because we would choose each of these even if no result were to follow), but we choose them also with a view to happiness, conceiving that through their instrumentality we shall be happy: but no man chooses happiness with a view to them, nor in fact with a view to any other thing whatsoever.
The same result[15] is seen to follow also from the notion of self-sufficiency, a quality thought to belong to the final good. Now by sufficient for Self, we mean not for a single individual living a solitary life, but for his parents also and children and wife, and, in general, friends and countrymen; for man is by nature adapted to a social existence. But of these, of course, some limit must be fixed: for if one extends it to parents and descendants and friends’ friends, there is no end to i...
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1 of 3 in Book I, Chapter V15 of 276 in work
Now entering Book I, Chapter V
⚖Man's Essential Function

Aristotle
Nicomachean EthicsThe author proposes that human happiness must be defined by the specific 'work' or function of a human being, just as an artisan or a physical organ is defined by its specific function.
...be most choice-worthy of all things; not being reckoned with any other thing,[16] for if it were so reckoned, it is plain we must then allow it, with the addition of ever so small a good, to be more choice-worthy than it was before:[17] because what is put to it becomes an addition of so much more good, and of goods the greater is ever the more choice-worthy. So then Happiness is manifestly something final and self-sufficient, being the end of all things which are and may be done. Chapter V.
But, it may be, to call Happiness the Chief Good is a mere truism, and what is wanted is some clearer account of its real nature. Now this object may be easily attained, when we have discovered what is the work of man; for as in the case of flute-player, statuary, or artisan of any kind, or, more generally, all who have any work or course of action, their Chief Good and Excellence is thought to reside in their work, so it would seem to be with man, if there is any work belonging to him. Are we then to suppose, that while carpenter and cobbler have certain works and courses of action, Man as Man has none, but is left by Nature without a work?…
not mere life, because that plainly is shared with him even by vegetables, and we want what is peculiar to him. We must separate off then the life of mere nourishment and growth, and next will come the life of sensation: but this again manifestly is common to horses, oxen, and every animal. There remains then a kind of life of the Rational Nature apt to act: and of this Nature there are two parts denominated Rational, the one as being obedient to Reason, the other as having and exerting it. Aga...
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2 of 3 in Book I, Chapter V16 of 276 in work
⚖The Human Function

Aristotle
Nicomachean EthicsThe author defines the 'Good of Man' as the soul's active operation in accordance with reason and excellence, performed over a complete life.
...wth, and next will come the life of sensation: but this again manifestly is common to horses, oxen, and every animal. There remains then a kind of life of the Rational Nature apt to act: and of this Nature there are two parts denominated Rational, the one as being obedient to Reason, the other as having and exerting it. Again, as this life is also spoken of in two ways,[19] we must take that which is in the way of actual working, because this is thought to be most properly entitled to the name.
If then the work of Man is a working of the soul in accordance with reason, or at least not independently of reason, and we say that the work of any given subject, and of that subject good of its kind, are the same in kind (as, for instance, of a harp-player and a good harp-player, and so on in every case, adding to the work eminence in the way of excellence; I mean, the work of a harp-player is to play the harp, and of a good harp-player to play it well); if, I say, this is so, and we assume the work of Man to be life of a certain kind, that is to say a working of the soul, and actions with reason, and of a good man to do these things well…
And we must add, ἐν βίῳ τελείῳ;[20] for as it is not one swallow or one fine day that makes a spring, so it is not one day or a short time that makes a man blessed and happy. Let this then be taken for a rough sketch of the Chief Good: since it is probably the right way to give first the outline, and fill it in afterwards. And it would seem that any man may improve and connect what is good in the sketch, and that time is a good discoverer and co-operator in such matters: it is thus in fact th...
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3 of 3 in Book I, Chapter V17 of 276 in work
⚖Contextual Exactness

Aristotle
Nicomachean EthicsThe author advises that one should not seek the same level of exactness in all subjects, but should instead adapt the precision of the inquiry to the nature of the subject matter.
...so it is not one day or a short time that makes a man blessed and happy. Let this then be taken for a rough sketch of the Chief Good: since it is probably the right way to give first the outline, and fill it in afterwards. And it would seem that any man may improve and connect what is good in the sketch, and that time is a good discoverer and co-operator in such matters: it is thus in fact that all improvements in the various arts have been brought about, for any man may fill up a deficiency.
You must remember also what has been already stated, and not seek for exactness in all matters alike, but in each according to the subject-matter, and so far as properly belongs to the system. The carpenter and geometrician, for instance, enquire into the right line in different fashion: the former so far as he wants it for his work, the latter enquires into its nature and properties, because he is concerned with the truth. So then should one do in other matters, that the incidental matters may not exceed the direct ones.
And again, you must not demand the reason either in all things alike,[21] because in some it is sufficient that the fact has been well demonstrated, which is the case with first principles; and the fact is the first step, i.e. starting-point or principle. And of these first principles some are obtained by induction, some by perception,[22] some by a course of habituation, others in other different ways. And we must try to trace up each in their own nature, and take pains to secure their bei...
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