of the column, and these are both different from the making of the
temple; and the making of the temple is complete (for it lacks nothing
with a view to the end proposed), but the making of the base or of the
triglyph is incomplete; for each is the making of only a part. They
differ in kind, then, and it is not possible to find at any and
every time a movement complete in form, but if at all, only in the
whole time. So, too, in the case of walking and all other movements.
For if locomotion is a movement from to there, it, too, has
differences in kind-flying, walking, leaping, and so on. And not
only so, but in walking itself there are such differences; for the
whence and whither are not the same in the whole racecourse and in a
part of it, nor in one part and in another, nor is it the same thing
to traverse this line and that; for one traverses not only a line
but one which is in a place, and this one is in a different place from
that. We have discussed movement with precision in another work, but
it seems that it is not complete at any and every time, but that the
many movements are incomplete and different in kind, since the
whence and whither give them their form. But of pleasure the form is
complete at any and every time. Plainly, then, pleasure and movement
must be different from each other, and pleasure must be one of the
things that are whole and complete. This would seem to be the case,
too, from the fact that it is not possible to move otherwise than in
time, but it is possible to be pleased; for that which takes place
in a moment is a whole.

  From these considerations it is clear, too, that these thinkers
are not right in saying there is a movement or a coming into being
of pleasure. For these cannot be ascribed to all things, but only to
those that are divisible and not wholes; there is no coming into being
of seeing nor of a point nor of a unit, nor is any of these a movement
or coming into being; therefore there is no movement or coming into
being of pleasure either; for it is a whole.

  Since every sense is active in relation to its object, and a sense
which is in good condition acts perfectly in relation to the most
beautiful of its objects (for perfect activity seems to be ideally
of this nature; whether we say that it is active, or the organ in
which it resides, may be assumed to be immaterial), it follows that in
the case of each sense the best activity is that of the
best-conditioned organ in relation to the finest of its objects. And
this activity will be the most complete and pleasant. For, while there
is pleasure in respect of any sense, and in respect of thought and
contemplation no less, the most complete is pleasantest, and that of a
well-conditioned organ in relation to the worthiest of its objects
is the most complete; and the pleasure completes the activity. But the
pleasure does not complete it in the same way as the combination of
object and sense, both good, just as health and the doctor are not
in the same way the cause of a man's being healthy. (That pleasure
is produced in respect to each sense is plain; for we speak of
sights and sounds as pleasant. It is also plain that it arises most of
all when both the sense is at its best and it is active in reference
to an object which corresponds; when both object and perceiver are
of the best there will always be pleasure, since the requisite agent
and patient are both present.) Pleasure completes the activity not
as the corresponding permanent state does, by its immanence, but as an
end which supervenes as the bloom of youth does on those in the flower
of their age. So long, then, as both the intelligible or sensible
object and the discriminating or contemplative faculty are as they
should be, the pleasure will be involved in the activity; for when
both the passive and the active factor are unchanged and are related
to each other in the same way, the same result naturally follows.

  How, then, is it that no one is continuously pleased? Is it that
we grow weary? Certainly all human beings are incapable of
continuous activity. Therefore pleasure also is not continuous; for it
accompanies activity. Some things delight us when they are new, but
later do so less, for the same reason; for at first the mind is in a
state of stimulation and intensely active about them, as people are
with respect to their vision when they look hard at a thing, but
afterwards our activity is not of this kind, but has grown relaxed;
for which reason the pleasure also is dulled.

  One might think that all men desire pleasure because they all aim at
life; life is an activity, and each man is active about those things
and with those faculties that he loves most; e.g. the musician is
active with his hearing in reference to tunes, the student with his
mind in reference to theoretical questions, and so on in each case;
now pleasure completes the activities, and therefore life, which
they desire. It is with good reason, then, that they aim at pleasure
too, since for every one it completes life, which is desirable. But
whether we choose life for the sake of pleasure or pleasure for the
sake of life is a question we may dismiss for the present. For they
seem to be bound up together and not to admit of separation, since
without activity pleasure does not arise, and every activity is
completed by the attendant pleasure.

                                 5

  For this reason pleasures seem, too, to differ in kind. For things
different in kind are, we think, completed by different things (we see
this to be true both of natural objects and of things produced by art,
e.g. animals, trees, a painting, a sculpture, a house, an
implement); and, similarly, we think that activities differing in kind
are completed by things differing in kind. Now the activities of
thought differ from those of the senses, and both differ among
themselves, in kind; so, therefore, do the pleasures that complete
them.

  This may be seen, too, from the fact that each of the pleasures is
bound up with the activity it completes. For an activity is