Here is a very helpful and balanced perspective on literature and aesthetics from a paper by C. S. Lewis published the book Christian Reflections (Eerdmans, 1967) page 10:
“The Christian will take literature a little less seriously than the cultured Pagan: he will feel less uneasy with a purely hedonistic standard for at least many kinds of work. The unbeliever is always apt to make a kind of religion of his aesthetic experiences; he feels ethically irresponsible, perhaps, but he braces his strength to receive responsibilities of another kind which seem to the Christian quite illusory. He has to be ‘creative’; he has to obey a mystical amoral law called his artistic conscience; and he commonly wishes to maintain his superiority to the great mass of mankind who turn to books for mere recreation. But the Christian knows from the outset that the salvation of a single soul is more important than the production or preservation of all the epics and tragedies in the world …
It thus may come about that Christian views on literature will strike the world as shallow and flippant; but the world must not misunderstand. When Christian work is done on a serious subject there is no gravity and no sublimity it cannot attain. But they will belong to the theme. That is why they will be real and lasting—mighty nouns with which literature, an adjectival thing, is here united, far over-topping the fussy and ridiculous claims of literature that tries to be important simply as literature.
And a posteriori it is not hard to argue that all the greatest poems have been made by men who valued something else much more than poetry… The real frivolity, the solemn vacuity, is all with those who make literature a self-existent thing to be valued for its own sake.”