by Aristotle
   it is that they recollect even without the effort of seeking to do so,
   viz. when the movement implied in recollection has supervened on
   some other which is its condition. For, as a rule, it is when
   antecedent movements of the classes here described have first been
   excited, that the particular movement implied in recollection follows.
   We need not examine a series of which the beginning and end lie far
   apart, in order to see how (by recollection) we remember; one in which
   they lie near one another will serve equally well. For it is clear
   that the method is in each case the same, that is, one hunts up the
   objective series, without any previous search or previous
   recollection. For (there is, besides the natural order, viz. the order
   of the pralmata, or events of the primary experience, also a customary
   order, and) by the effect of custom the mnemonic movements tend to
   succeed one another in a certain order. Accordingly, therefore, when
   one wishes to recollect, this is what he will do: he will try to
   obtain a beginning of movement whose sequel shall be the movement
   which he desires to reawaken. This explains why attempts at
   recollection succeed soonest and best when they start from a beginning
   (of some objective series). For, in order of succession, the
   mnemonic movements are to one another as the objective facts (from
   which they are derived). Accordingly, things arranged in a fixed
   order, like the successive demonstrations in geometry, are easy to
   remember (or recollect) while badly arranged subjects are remembered
   with difficulty.
   Recollecting differs also in this respect from relearning, that
   one who recollects will be able, somehow, to move, solely by his own
   effort, to the term next after the starting-point. When one cannot
   do this of himself, but only by external assistance, he no longer
   remembers (i.e. he has totally forgotten, and therefore of course
   cannot recollect). It often happens that, though a person cannot
   recollect at the moment, yet by seeking he can do so, and discovers
   what he seeks. This he succeeds in doing by setting up many movements,
   until finally he excites one of a kind which will have for its
   sequel the fact he wishes to recollect. For remembering (which is
   the condicio sine qua non of recollecting) is the existence,
   potentially, in the mind of a movement capable of stimulating it to
   the desired movement, and this, as has been said, in such a way that
   the person should be moved (prompted to recollection) from within
   himself, i.e. in consequence of movements wholly contained within
   himself.
   But one must get hold of a starting-point. This explains why it is
   that persons are supposed to recollect sometimes by starting from
   mnemonic loci. The cause is that they pass swiftly in thought from one
   point to another, e.g. from milk to white, from white to mist, and
   thence to moist, from which one remembers Autumn (the 'season of
   mists'), if this be the season he is trying to recollect.
   It seems true in general that the middle point also among all things
   is a good mnemonic starting-point from which to reach any of them. For
   if one does not recollect before, he will do so when he has come to
   this, or, if not, nothing can help him; as, e.g. if one were to have
   in mind the numerical series denoted by the symbols A, B, G, D, E,
   Z, I, H, O. For, if he does not remember what he wants at E, then at E
   he remembers O; because from E movement in either direction is
   possible, to D or to Z. But, if it is not for one of these that he
   is searching, he will remember (what he is searching for) when he
   has come to G if he is searching for H or I. But if (it is) not (for H
   or I that he is searching, but for one of the terms that remain), he
   will remember by going to A, and so in all cases (in which one
   starts from a middle point). The cause of one's sometimes recollecting
   and sometimes not, though starting from the same point, is, that
   from the same starting-point a movement can be made in several
   directions, as, for instance, from G to I or to D. If, then, the
   mind has not (when starting from E) moved in an old path (i.e. one
   in which it moved first having the objective experience, and that,
   therefore, in which un-'ethized' phusis would have it again move),
   it tends to move to the more customary; for (the mind having, by
   chance or otherwise, missed moving in the 'old' way) Custom now
   assumes the role of Nature. Hence the rapidity with which we recollect
   what we frequently think about. For as regular sequence of events is
   in accordance with nature, so, too, regular sequence is observed in
   the actualization of kinesis (in consciousness), and here frequency
   tends to produce (the regularity of) nature. And since in the realm of
   nature occurrences take place which are even contrary to nature, or
   fortuitous, the same happens a fortiori in the sphere swayed by
   custom, since in this sphere natural law is not similarly established.
   Hence it is that (from the same starting-point) the mind receives an
   impulse to move sometimes in the required direction, and at other
   times otherwise, (doing the latter) particularly when something else
   somehow deflects the mind from the right direction and attracts it
   to itself. This last consideration explains too how it happens that,
   when we want to remember a name, we remember one somewhat like it,
   indeed, but blunder in reference to (i.e. in pronouncing) the one we
   intended.
   Thus, then, recollection takes place.
   But the point of capital importance is that (for the purpose of
   recollection) one should cognize, determinately or indeterminately,
   the time-relation (of that which he wishes to recollect). There
   is,-let it be taken as a fact,-something by which one distinguishes
   a greater and a smaller time; and it is reasonable to think that one
   does this in a way analogous to that in which one discerns (spacial)
   magnitudes. For it is not by the mind's reaching out towards them,
   as some say a visual ray from the eye does (in seeing), that one
   thinks of large things at a distance in space (for even if they are
   not there, one may similarly think them); but one does so by a
   proportionate mental movement. For there are in the mind the like
   figures and movements (i.e. 'like' to those of objects and events).
   Therefore, when one thinks the greater objects, in what will his
   thinking those differ from his thinking the smaller? (In nothing,)
   because all the internal though smaller are as it were proportional to
   the external. Now, as we may assume within a person something
   proportional to the forms (of distant magnitudes), so, too, we may
   doubtless assume also something else proportional to their
   distances. As, therefore, if one has (psychically) the movement in AB,
   BE, he constructs in thought (i.e. knows objectively) GD, since AG and
   GD bear equal ratios respectively (to AB and BE), (so he who
   recollects also proceeds). Why then does he construct GD rather than
   ZH? Is it not because as AG is to AB, so is O to I? These movements
 />
   therefore (sc. in AB, BE, and in O:I) he has simultaneously. But if he
   wishes to construct to thought ZH, he has in mind BE in like manner as
   before (when constructing GD), but now, instead of (the movements of
   the ratio) O:I, he has in mind (those of the ratio K:L; for
   K:L::ZA:BA. (See diagram.)
   When, therefore, the 'movement' corresponding to the object and that
   corresponding to its time concur, then one actually remembers. If
   one supposes (himself to move in these different but concurrent
   ways) without really doing so, he supposes himself to remember.
   For one may be mistaken, and think that he remembers when he
   really does not. But it is not possible, conversely, that when one
   actually remembers he should not suppose himself to remember, but
   should remember unconsciously. For remembering, as we have conceived
   it, essentially implies consciousness of itself. If, however, the
   movement corresponding to the objective fact takes place without
   that corresponding to the time, or, if the latter takes place
   without the former, one does not remember.
   The movement answering to the time is of two kinds. Sometimes in
   remembering a fact one has no determinate time-notion of it, no such
   notion as that e.g. he did something or other on the day before
   yesterday; while in other cases he has a determinate notion-of the
   time. Still, even though one does not remember with actual
   determination of the time, he genuinely remembers, none the less.
   Persons are wont to say that they remember (something), but yet do not
   know when (it occurred, as happens) whenever they do not know
   determinately the exact length of time implied in the 'when'.
   It has been already stated that those who have a good memory are not
   identical with those who are quick at recollecting. But the act of
   recollecting differs from that of remembering, not only
   chronologically, but also in this, that many also of the other animals
   (as well as man) have memory, but, of all that we are acquainted with,
   none, we venture to say, except man, shares in the faculty of
   recollection. The cause of this is that recollection is, as it were
   a mode of inference. For he who endeavours to recollect infers that he
   formerly saw, or heard, or had some such experience, and the process
   (by which he succeeds in recollecting) is, as it were, a sort of
   investigation. But to investigate in this way belongs naturally to
   those animals alone which are also endowed with the faculty of
   deliberation; (which proves what was said above), for deliberation
   is a form of inference.
   That the affection is corporeal, i.e. that recollection is a
   searching for an 'image' in a corporeal substrate, is proved by the
   fact that in some persons, when, despite the most strenuous
   application of thought, they have been unable to recollect, it (viz.
   the anamnesis = the effort at recollection) excites a feeling of
   discomfort, which, even though they abandon the effort at
   recollection, persists in them none the less; and especially in
   persons of melancholic temperament. For these are most powerfully
   moved by presentations. The reason why the effort of recollection is
   not under the control of their will is that, as those who throw a
   stone cannot stop it at their will when thrown, so he who tries to
   recollect and 'hunts' (after an idea) sets up a process in a
   material part, (that) in which resides the affection. Those who have
   moisture around that part which is the centre of sense-perception
   suffer most discomfort of this kind. For when once the moisture has
   been set in motion it is not easily brought to rest, until the idea
   which was sought for has again presented itself, and thus the movement
   has found a straight course. For a similar reason bursts of anger or
   fits of terror, when once they have excited such motions, are not at
   once allayed, even though the angry or terrified persons (by efforts
   of will) set up counter motions, but the passions continue to move
   them on, in the same direction as at first, in opposition to such
   counter motions. The affection resembles also that in the case of
   words, tunes, or sayings, whenever one of them has become inveterate
   on the lips. People give them up and resolve to avoid them; yet
   again they find themselves humming the forbidden air, or using the
   prohibited word. Those whose upper parts are abnormally large, as.
   is the case with dwarfs, have abnormally weak memory, as compared with
   their opposites, because of the great weight which they have resting
   upon the organ of perception, and because their mnemonic movements
   are, from the very first, not able to keep true to a course, but are
   dispersed, and because, in the effort at recollection, these movements
   do not easily find a direct onward path. Infants and very old
   persons have bad memories, owing to the amount of movement going on
   within them; for the latter are in process of rapid decay, the
   former in process of vigorous growth; and we may add that children,
   until considerably advanced in years, are dwarf-like in their bodily
   structure. Such then is our theory as regards memory and remembering
   their nature, and the particular organ of the soul by which animals
   remember; also as regards recollection, its formal definition, and the
   manner and causes-of its performance.
   -THE END-
   .
   350 BC
   PHYSICS
   by Aristotle
   translated by R. P. Hardie and R. K. Gaye
   Book I
   1
   WHEN the objects of an inquiry, in any department, have
   principles, conditions, or elements, it is through acquaintance with
   these that knowledge, that is to say scientific knowledge, is
   attained. For we do not think that we know a thing until we are
   acquainted with its primary conditions or first principles, and have
   carried our analysis as far as its simplest elements. Plainly
   therefore in the science of Nature, as in other branches of study, our
   first task will be to try to determine what relates to its principles.
   The natural way of doing this is to start from the things which
   are more knowable and obvious to us and proceed towards those which
   are clearer and more knowable by nature; for the same things are not
   'knowable relatively to us' and 'knowable' without qualification. So
   in the present inquiry we must follow this method and advance from
   what is more obscure by nature, but clearer to us, towards what is
   more clear and more knowable by nature.
   Now what is to us plain and obvious at first is rather confused
   masses, the elements and principles of which become known to us
   later by analysis. Thus we must advance from generalities to
   particulars; for it is a whole that is best known to sense-perception,
   and a generality is a kind of whole, comprehending many things
   within it, like parts. Much the same thing happens in the relation
   of the name to the formula. A name, e.g. 'round', means vaguely a sort
   of whole: its definition analyses this into its particular senses.
   Similarly a child beg
ins by calling all men 'father', and all women
   'mother', but later on distinguishes each of them.
   2
   The principles in question must be either (a) one or (b) more than
   one. If (a) one, it must be either (i) motionless, as Parmenides and
   Melissus assert, or (ii) in motion, as the physicists hold, some
   declaring air to be the first principle, others water. If (b) more
   than one, then either (i) a finite or (ii) an infinite plurality. If
   (i) finite (but more than one), then either two or three or four or
   some other number. If (ii) infinite, then either as Democritus
   believed one in kind, but differing in shape or form; or different
   in kind and even contrary.
   A similar inquiry is made by those who inquire into the number of
   existents: for they inquire whether the ultimate constituents of
   existing things are one or many, and if many, whether a finite or an
   infinite plurality. So they too are inquiring whether the principle or
   element is one or many.
   Now to investigate whether Being is one and motionless is not a
   contribution to the science of Nature. For just as the geometer has
   nothing more to say to one who denies the principles of his
   science-this being a question for a different science or for or common
   to all-so a man investigating principles cannot argue with one who
   denies their existence. For if Being is just one, and one in the way
   mentioned, there is a principle no longer, since a principle must be
   the principle of some thing or things.
   To inquire therefore whether Being is one in this sense would be
   like arguing against any other position maintained for the sake of
   argument (such as the Heraclitean thesis, or such a thesis as that
   Being is one man) or like refuting a merely contentious argument-a
   description which applies to the arguments both of Melissus and of
   Parmenides: their premisses are false and their conclusions do not
   follow. Or rather the argument of Melissus is gross and palpable and