Why Fiction?

"We demand windows. Literature as Logos is a series of windows, even of doors. One of the things we feel after reading a great work is 'I have got out.' Or from another point of view, 'I have got in'; pierced the shell of some other monad and discovered what it is like inside ...  In reading great literature I become a thousand men and yet remain myself. Like the night sky in a Greek poem, I see with a thousand eyes, but it is still I who see. Here, as in worship, in love, in moral action, and in knowing, I transcend myself; and am never more myself than when I do." 

~C.S. Lewis

Do you ever wonder why fiction exists-- why you write or read it? I love Lewis's take. Any additional thoughts?