In our day the conventional element in literature is elaborately disguised by a law of copyright pretending that every work of art is an invention distinctive enough to be patented.
Northrop FryeScience begins with the world we have to live in, accepting its data and trying to explain its laws. From there, it moves toward the imagination: it becomes a mental construct, a model of a possible way of interpreting experience. The further it goes in this direction, the more it tends to speak the language of mathematics, which is really one of the languages of the imagination, along with literature and music. Art, on the other hand, begins with the world we construct, not with the world we see. It starts with the imagination, and then works toward ordinary experience.
Northrop FryeOne of the most obvious uses of literature, I think, is its encouragement of tolerance... Bigots and fanatics seldom have any use for the arts, because they're so preoccupied with their beliefs and actions that they can't see them also as possibilities.
Northrop FryeCharacters tend to be either for or against the quest. If they assist it, they are idealized as simply gallant or pure; if they obstruct it, they are characterized as simply villainous or cowardly. Hence every typical character...tends to have his moral opposite confronting him, like black and white pieces in a chess game.
Northrop Frye