make a stronger impression by reason of this concurrence. Besides
which, the imitative arts, especially poetry, owe much of their
effect to a similar exhibition of properties quite foreign to the
imagination, insomuch that in every line of the most applauded poems,
we meet with either ideas drawn from the external senses, or truths
discovered to the understanding, or illustrations of contrivance and
final causes, or, above all the rest, with circumstances proper to
awaken and engage the passions. It was, therefore, necessary to
enumerate and exemplify these different species of pleasure;
especially that from the passions, which, as it is supreme in the
noblest work of human genius, so being in some particulars not a
little surprising, gave an opportunity to enliven the didactic turn
of the poem, by introducing an allegory to account for the appearance.

After these parts of the subject which hold chiefly of admiration,
or naturally warm and interest the mind, a pleasure of a very
different nature, that which arises from ridicule, came next to be
considered. As this is the foundation of the comic manner in all the
arts, and has been but very imperfectly treated by moral writers, it
was thought proper to give it a particular illustration, and to
distinguish the general sources from which the ridicule of
characters is derived. Here, too, a change of style became necessary;
such a one as might yet be consistent, if possible, with the general
taste of composition in the serious parts of the subject: nor is it
an easy task to give any tolerable force to images of this kind,
without running either into the gigantic expressions of the mock
heroic, or the familiar and poetical raillery of professed satire;
neither of which would have been proper here.

The materials of all imitation being thus laid open, nothing now