Hemingway had all sorts of insights about writing, but was always quick to admit that it's a lonely life. 60 years ago, in 1954, he won a Nobel Prize for Literature and had this to say about the writing life:
Writing, at its best, is a lonely life. Organizations for writers palliate the writer’s loneliness but I doubt if they improve his writing. He grows in public stature as he sheds his loneliness and often his work deteriorates. For he does his work alone and if he is a good enough writer he must face eternity, or the lack of it, each day.