Anybody can find out if he is a writer. If he were a writer, when he tried to write of some particular day, he would find in the effort that he could recall exactly how the light fell and how the temperature felt, and all the quality of it. Most people cannot do it. If they can do it, they may never be successful in a pecuniary sense, but that ability is at the bottom of writing, I am sure.
I believe the writer... should always be the final judge. I have always held to that position and have sometimes seen books hurt thereby, but at least as often helped. The book belongs to the author.