I'm not sure I'm happy with words such as "task" or "role" when they are attached to literature. I prefer to talk about the gift of literature rather than its role or task. You know, gynecology has a role; sex is a gift. And literature is not about sending messages.
Amos OzIsrael is a fulfilled dream. Nothing that exists here existed here a hundred years ago. "The State of the Jews" was not a title of a country. It was a title of a futuristic novel. A little more than a hundred years ago, "Tel Aviv" was not a city. It was a title of another novel written by the same author. The "Return to Zion" was a name of another novel. There was a bookshelf. There was no state. There was no nation. All you can see, if you look through the window - everything you see is a fulfillment of dreams, different dreams.
Amos Oz