proof that the existence of such a standard is necessary to the existence
of the arts. The standard or measure, which we are now only applying to
the arts, may be some day required with a view to the demonstration of
absolute truth.

We may now divide this art of measurement into two parts; placing in the
one part all the arts which measure the relative size or number of objects,
and in the other all those which depend upon a mean or standard. Many
accomplished men say that the art of measurement has to do with all things,
but these persons, although in this notion of theirs they may very likely
be right, are apt to fail in seeing the differences of classes--they jumble
together in one the 'more' and the 'too much,' which are very different
things. Whereas the right way is to find the differences of classes, and
to comprehend the things which have any affinity under the same class.

I will make one more observation by the way. When a pupil at a school is
asked the letters which make up a particular word, is he not asked with a
view to his knowing the same letters in all words? And our enquiry about
the Statesman in like manner is intended not only to improve our knowledge
of politics, but our reasoning powers generally. Still less would any one
analyze the nature of weaving for its own sake. There is no difficulty in
exhibiting sensible images, but the greatest and noblest truths have no
outward form adapted to the eye of sense, and are only revealed in thought.
And all that we are now saying is said for the sake of them. I make these
remarks, because I want you to get rid of any impression that our
discussion about weaving and about the reversal of the universe, and the
other discussion about the Sophist and not-being, were tedious and
irrelevant. Please to observe that they can only be fairly judged when
compared with what is meet; and yet not with what is meet for producing
pleasure, nor even meet for making discoveries, but for the great end of