shall then be in a fair way for getting soberness, and righteousness
with wisdom. This is evident enough, and the friends of physical science
would admit it.

But perhaps they may not have sufficiently observed another thing:
namely, that the several powers just mentioned are not isolated, but
there is, in the generality of mankind, a perpetual tendency to relate
them one to another in divers ways. With one such way of relating them I
am particularly concerned now. Following our instinct for intellect and
knowledge, we acquire pieces of knowledge; and presently in the
generality of men, there arises the desire to relate these pieces of
knowledge to our sense for conduct, to our sense for beauty,--and there
is weariness and dissatisfaction if the desire is balked. Now in this
desire lies, I think, the strength of that hold which letters have upon
us.

All knowledge is, as I said just now, interesting; and even items of
knowledge which from the nature of the case cannot well be related, but
must stand isolated in our thoughts, have their interest. Even lists of
exceptions have their interest. If we are studying Greek accents it is
interesting to know that _pais_ and _pas_, and some other monosyllables
of the same form of declension, do not take the circumflex upon the last
syllable of the genitive plural, but vary, in this respect, from the
common rule. If we are studying physiology, it is interesting to know
that the pulmonary artery carries dark blood and the pulmonary vein
carries bright blood, departing in this respect from the common rule for
the division of labor between the veins and the arteries. But every one
knows how we seek naturally to combine the pieces of our knowledge
together, to bring them under general rules, to relate them to
principles; and how unsatisfactory and tiresome it would be to go on
forever learning lists of exceptions, or accumulating items of fact
which must stand isolated.

Well, that same need of relating our knowledge, which operates here
within the sphere of our knowledge itself, we shall find operating,
also, outside that sphere. We experience, as we go on learning and
knowing,--the vast majority of us experience,--the need of relating what
we have learnt and known to the sense which we have in us for conduct,
to the sense which we have in us for beauty.

A certain Greek prophetess of Mantineia in Arcadia, Diotima[126] by
name, once explained to the philosopher Socrates that love