One function of literature - of important literature, of necessary literature - is to be prophetic. What we have here, writ large, is the perennial literary - or cultural - quarrel: between the ancients and the moderns.
. . .
One task of literature is to formulate questions and construct counter-statements to the reigning pieties. And even when art is not oppositional, the arts gravitate toward contrariness. Literature is dialogue; responsiveness. Literature might be described as the history of human responsiveness to what is alive and what is moribund as cultures evolve and interact with one another.
Writers can do something to combat these clichés of our separateness, our difference - for writers are makers, not just transmitters, of myths. Literature offers not only myths but counter-myths, just as life offers counter-experiences - experiences that confound what you thought you thought, or felt, or believed.
Literature can tell us what the world is like.
Literature can give standards and pass on deep knowledge, incarnated in language, in narrative.
Literature can train, and exercise, our ability to weep for those who are not us or ours.
. . .
To have access to literature, world literature, was to escape the prison of national vanity, of philistinism, of compulsory provincialism, of inane schooling, of imperfect destinies and bad luck. Literature was the passport to enter a larger life; that is, the zone of freedom.
Literature was freedom. Especially in a time in which the values of reading and inwardness are so strenuously challenged, literature is freedom.
(Guardian Unlimited Books : Review : Susan Sontag :)