As for Comedy, it is (as has been observed) an imitation of
men worse than the average; worse, however, not as regards
any and every sort of fault, but only as regards one particular
kind, the Ridiculous, which is a species of the Ugly.
The Ridiculous may be defined as a mistake or deformity not
productive of pain or harm to others; the mask, for instance,
that excites laughter, is something ugly and distorted without
causing pain.
Though the successive changes in Tragedy and their authors are
not unknown, we cannot say the same of Comedy; its early
stages passed unnoticed, because it was not as yet taken
up in a serious way.
It was only at a late point in its progress that a chorus of
comedians was officially granted by the archon; they used
to be mere volunteers. It had also already certain definite
forms at the time when the record of those termed comic
poets begins. Who it was who supplied it with masks, or
prologues, or a plurality of actors and the like, has remained unknown.
The invented Fable, or Plot, however, originated in Sicily, with
Epicharmus and Phormis;
of Athenian poets Crates was the first to drop the Comedy
of invective and frame stories of a general and non-personal
nature, in other words, Fables or Plots.
Epic poetry, then, has been seen to agree with Tragedy to
this extent, that of being an imitation of serious subjects
in a grand kind of verse. It differs from it, however, (1) in
that it is in one kind of verse and in narrative form;
and (2) in its length—which is due to its action having
no fixed limit of time, whereas Tragedy endeavours to keep
as far as possible within a single circuit of the sun, or
something near that.
This, I say, is another point of difference between them,
though at first the practice in this respect was just the
same in tragedies as in epic poems.
They differ also (3) in their constituents, some being common
to both and others peculiar to Tragedy—
hence a judge of good and bad in Tragedy is a judge of
that in epic poetry also. All the parts of an epic are included
in Tragedy; but those of Tragedy are not all of them to
be found in the Epic.
Poetics. Aristotle. Ingram Bywater (Translator), ed. Gilbert Murray. Oxford. 1909.