Aristotle's "Poetics"

If there is anything worth knowing, Artistole (link to wikipedia) has already figured it out and written about it. His book, "Poetics", is only one such example. I randomly opened a page in this fine little book this morning and came across the following lines:

...it is not the function of the poet to relate what has happened, but what may happen....The poet and the historian differ not by writing in verse or in prose...The true difference is that one relates what has happened, the other what may happen.

Poetics rawks. (link to downloadable version on Gutenberg.org)