From this interview
(not fresh at all, but good) with Michael Cunningham:
I always work intuitively without much knowledge of where I'm going. I find that if I insist too strongly from the outset it won't take on the life that a novel needs to have. I find that by writing in the dark and coming up with a big messy first draft and reshape and rework I stand the best chance of coming up with a book that's a little smarter than I am. That may be useful to others struggling with novels. There's always a point during the writing when the book falls apart, which is a difficult period and no fun, but what actually happens is the novel is outgrowing my idea and taking on a life of its own. All novelists are heroes. Blessings on your efforts.