by Aristotle
   the other; and upon the one it follows that it is desirable, while
   upon the other it follows that it is objectionable. The sequence,
   therefore, in the latter case also is direct; for the desirable is the
   contrary of the objectionable. Likewise also in other cases. The
   sequence is, on the other hand, converse in such a case as this:
   Health follows upon vigour, but disease does not follow upon debility;
   rather debility follows upon disease. In this case, then, clearly
   the sequence is converse. Converse sequence is, however, rare in the
   case of contraries; usually the sequence is direct. If, therefore, the
   contrary of the one term does not follow upon the contrary of the
   other either directly or conversely, clearly neither does the one term
   follow upon the other in the statement made: whereas if the one
   followed the other in the case of the contraries, it must of necessity
   do so as well in the original statement.
   You should look also into cases of the privation or presence of a
   state in like manner to the case of contraries. Only, in the case of
   such privations the converse sequence does not occur: the sequence
   is always bound to be direct: e.g. as sensation follows sight, while
   absence of sensation follows blindness. For the opposition of
   sensation to absence of sensation is an opposition of the presence
   to the privation of a state: for the one of them is a state, and the
   other the privation of it.
   The case of relative terms should also be studied in like manner
   to that of a state and its privation: for the sequence of these as
   well is direct; e.g. if 3/1 is a multiple, then 1/3 is a fraction: for
   3/1 is relative to 1/3, and so is a multiple to a fraction. Again,
   if knowledge be a conceiving, then also the object of knowledge is
   an object of conception; and if sight be a sensation, then also the
   object of sight is an object of sensation. An objection may be made
   that there is no necessity for the sequence to take place, in the case
   of relative terms, in the way described: for the object of sensation
   is an object of knowledge, whereas sensation is not knowledge. The
   objection is, however, not generally received as really true; for many
   people deny that there is knowledge of objects of sensation. Moreover,
   the principle stated is just as useful for the contrary purpose,
   e.g. to show that the object of sensation is not an object of
   knowledge, on the ground that neither is sensation knowledge.
   9
   Again look at the case of the co-ordinates and inflected forms of
   the terms in the thesis, both in demolishing and in establishing it.
   By co-ordinates' are meant terms such as the following: 'Just deeds'
   and the 'just man' are coordinates of 'justice', and 'courageous
   deeds' and the 'courageous man' are co-ordinates of courage.
   Likewise also things that tend to produce and to preserve anything are
   called co-ordinates of that which they tend to produce and to
   preserve, as e.g. 'healthy habits' are co-ordinates of 'health' and
   a 'vigorous constitutional' of a 'vigorous constitution' and so
   forth also in other cases. 'Co-ordinate', then, usually describes
   cases such as these, whereas 'inflected forms' are such as the
   following: 'justly', 'courageously', 'healthily', and such as are
   formed in this way. It is usually held that words when used in their
   inflected forms as well are co-ordinates, as (e.g.) 'justly' in
   relation to justice, and 'courageously' to courage; and then
   'co-ordinate' describes all the members of the same kindred series,
   e.g. 'justice', 'just', of a man or an act, 'justly'. Clearly, then,
   when any one member, whatever its kind, of the same kindred series
   is shown to be good or praiseworthy, then all the rest as well come to
   be shown to be so: e.g. if 'justice' be something praiseworthy, then
   so will 'just', of a man or thing, and 'justly' connote something
   praiseworthy. Then 'justly' will be rendered also 'praiseworthily',
   derived will by the same inflexion from 'the praiseworthy' whereby
   'justly' is derived from 'justice'.
   Look not only in the case of the subject mentioned, but also in
   the case of its contrary, for the contrary predicate: e.g. argue
   that good is not necessarily pleasant; for neither is evil painful: or
   that, if the latter be the case, so is the former. Also, if justice be
   knowledge, then injustice is ignorance: and if 'justly' means
   'knowingly' and 'skilfully', then 'unjustly' means 'ignorantly' and
   'unskilfully': whereas if the latter be not true, neither is the
   former, as in the instance given just now: for 'unjustly' is more
   likely to seem equivalent to 'skilfully' than to 'unskilfully'. This
   commonplace rule has been stated before in dealing with the sequence
   of contraries; for all we are claiming now is that the contrary of P
   shall follow the contrary of S.
   Moreover, look at the modes of generation and destruction of a
   thing, and at the things which tend to produce or to destroy it,
   both in demolishing and in establishing a view. For those things whose
   modes of generation rank among good things, are themselves also
   good; and if they themselves be good, so also are their modes of
   generation. If, on the other hand, their modes of generation be
   evil, then they themselves also are evil. In regard to modes of
   destruction the converse is true: for if the modes of destruction rank
   as good things, then they themselves rank as evil things; whereas if
   the modes of destruction count as evil, they themselves count as good.
   The same argument applies also to things tending to produce and
   destroy: for things whose productive causes are good, themselves
   also rank as good; whereas if causes destructive of them are good,
   they themselves rank as evil.
   10
   Again, look at things which are like the subject in question, and
   see if they are in like case; e.g. if one branch of knowledge has more
   than one object, so also will one opinion; and if to possess sight
   be to see, then also to possess hearing will be to hear. Likewise also
   in the case of other things, both those which are and those which
   are generally held to be like. The rule in question is useful for both
   purposes; for if it be as stated in the case of some one like thing,
   it is so with the other like things as well, whereas if it be not so
   in the case of some one of them, neither is it so in the case of the
   others. Look and see also whether the cases are alike as regards a
   single thing and a number of things: for sometimes there is a
   discrepancy. Thus, if to 'know' a thing be to 'think of' it, then also
   to 'know many things' is to 'be thinking of many things'; whereas this
   is not true; for it is possible to know many things but not to be
   thinking of them. If, then, the latter proposition be not true,
   neither was the former that dealt with a single thing, viz. that to
   'know' a thing is to 'think of' it.
   Moreover, argue from greater and less degrees. In regard to
   greater degrees there are four commonplace rules. One is: See
   whether a greater
 degree of the predicate follows a greater degree
   of the subject: e.g. if pleasure be good, see whether also a greater
   pleasure be a greater good: and if to do a wrong be evil, see
   whether also to do a greater wrong is a greater evil. Now this rule is
   of use for both purposes: for if an increase of the accident follows
   an increase of the subject, as we have said, clearly the accident
   belongs; while if it does not follow, the accident does not belong.
   You should establish this by induction. Another rule is: If one
   predicate be attributed to two subjects; then supposing it does not
   belong to the subject to which it is the more likely to belong,
   neither does it belong where it is less likely to belong; while if
   it does belong where it is less likely to belong, then it belongs as
   well where it is more likely. Again: If two predicates be attributed
   to one subject, then if the one which is more generally thought to
   belong does not belong, neither does the one that is less generally
   thought to belong; or, if the one that is less generally thought to
   belong does belong, so also does the other. Moreover: If two
   predicates be attributed to two subjects, then if the one which is
   more usually thought to belong to the one subject does not belong,
   neither does the remaining predicate belong to the remaining
   subject; or, if the one which is less usually thought to belong to the
   one subject does belong, so too does the remaining predicate to the
   remaining subject.
   Moreover, you can argue from the fact that an attribute belongs,
   or is generally supposed to belong, in a like degree, in three ways,
   viz. those described in the last three rules given in regard to a
   greater degree.' For supposing that one predicate belongs, or is
   supposed to belong, to two subjects in a like degree, then if it
   does not belong to the one, neither does it belong to the other; while
   if it belongs to the one, it belongs to the remaining one as well. Or,
   supposing two predicates to belong in a like degree to the same
   subject, then, if the one does not belong, neither does the
   remaining one; while if the one does belong, the remaining one belongs
   as well. The case is the same also if two predicates belong in a
   like degree to two subjects; for if the one predicate does not
   belong to the one subject, neither does the remaining predicate belong
   to the remaining subject, while if the one predicate does belong to
   the one subject, the remaining predicate belongs to the remaining
   subject as well.
   11
   You can argue, then, from greater or less or like degrees of truth
   in the aforesaid number of ways. Moreover, you should argue from the
   addition of one thing to another. If the addition of one thing to
   another makes that other good or white, whereas formerly it was not
   white or good, then the thing added will be white or good-it will
   possess the character it imparts to the whole as well. Moreover, if an
   addition of something to a given object intensifies the character
   which it had as given, then the thing added will itself as well be
   of that character. Likewise, also, in the case of other attributes.
   The rule is not applicable in all cases, but only in those in which
   the excess described as an 'increased intensity' is found to take
   place. The above rule is, however, not convertible for overthrowing
   a view. For if the thing added does not make the other good, it is not
   thereby made clear whether in itself it may not be good: for the
   addition of good to evil does not necessarily make the whole good, any
   more than the addition of white to black makes the whole white.
   Again, any predicate of which we can speak of greater or less
   degrees belongs also absolutely: for greater or less degrees of good
   or of white will not be attributed to what is not good or white: for a
   bad thing will never be said to have a greater or less degree of
   goodness than another, but always of badness. This rule is not
   convertible, either, for the purpose of overthrowing a predication:
   for several predicates of which we cannot speak of a greater degree
   belong absolutely: for the term 'man' is not attributed in greater and
   less degrees, but a man is a man for all that.
   You should examine in the same way predicates attributed in a
   given respect, and at a given time and place: for if the predicate
   be possible in some respect, it is possible also absolutely. Likewise,
   also, is what is predicated at a given time or place: for what is
   absolutely impossible is not possible either in any respect or at
   any place or time. An objection may be raised that in a given
   respect people may be good by nature, e.g. they may be generous or
   temperately inclined, while absolutely they are not good by nature,
   because no one is prudent by nature. Likewise, also, it is possible
   for a destructible thing to escape destruction at a given time,
   whereas it is not possible for it to escape absolutely. In the same
   way also it is a good thing at certain places to follow see and such a
   diet, e.g. in infected areas, though it is not a good thing
   absolutely. Moreover, in certain places it is possible to live
   singly and alone, but absolutely it is not possible to exist singly
   and alone. In the same way also it is in certain places honourable
   to sacrifice one's father, e.g. among the Triballi, whereas,
   absolutely, it is not honourable. Or possibly this may indicate a
   relativity not to places but to persons: for it is all the same
   wherever they may be: for everywhere it will be held honourable
   among the Triballi themselves, just because they are Triballi.
   Again, at certain times it is a good thing to take medicines, e.g.
   when one is ill, but it is not so absolutely. Or possibly this again
   may indicate a relativity not to a certain time, but to a certain
   state of health: for it is all the same whenever it occurs, if only
   one be in that state. A thing is 'absolutely' so which without any
   addition you are prepared to say is honourable or the contrary. Thus
   (e.g.) you will deny that to sacrifice one's father is honourable:
   it is honourable only to certain persons: it is not therefore
   honourable absolutely. On the other hand, to honour the gods you
   will declare to be honourable without adding anything, because that is
   honourable absolutely. So that whatever without any addition is
   generally accounted to be honourable or dishonourable or anything else
   of that kind, will be said to be so 'absolutely'.
   Book III
   1
   THE question which is the more desirable, or the better, of two or
   more things, should be examined upon the following lines: only first
   of all it must be clearly laid down that the inquiry we are making
   concerns not things that are widely divergent and that exhibit great
   differences from one another (for nobody raises any doubt whether
   happiness or wealth is more desirable), but things that are nearly
   related and about which we commonly discuss for which of the two we
   ought rather to vote, because we do not see any advantage on either
<
br />   side as compared with the other. Clearly, in such cases if we can show
   a single advantage, or more than one, our judgement will record our
   assent that whichever side happens to have the advantage is the more
   desirable.
   First, then, that which is more lasting or secure is more
   desirable than that which is less so: and so is that which is more
   likely to be chosen by the prudent or by the good man or by the
   right law, or by men who are good in any particular line, when they
   make their choice as such, or by the experts in regard to any
   particular class of things; i.e. either whatever most of them or
   what all of them would choose; e.g. in medicine or in carpentry
   those things are more desirable which most, or all, doctors would
   choose; or, in general, whatever most men or all men or all things
   would choose, e.g. the good: for everything aims at the good. You
   should direct the argument you intend to employ to whatever purpose
   you require. Of what is 'better' or 'more desirable' the absolute
   standard is the verdict of the better science, though relatively to
   a given individual the standard may be his own particular science.
   In the second place, that which is known as 'an x' is more desirable
   than that which does not come within the genus 'x'-e.g. justice than a
   just man; for the former falls within the genus 'good', whereas the
   other does not, and the former is called 'a good', whereas the
   latter is not: for nothing which does not happen to belong to the
   genus in question is called by the generic name; e.g. a 'white man' is
   not 'a colour'. Likewise also in other cases.
   Also, that which is desired for itself is more desirable than that
   which is desired for something else; e.g. health is more desirable
   than gymnastics: for the former is desired for itself, the latter
   for something else. Also, that which is desirable in itself is more
   desirable than what is desirable per accidens; e.g. justice in our
   friends than justice in our enemies: for the former is desirable in
   itself, the latter per accidens: for we desire that our enemies should