Hemingway and Saroyan had the line, the magic of it. The problem was that Hemingway didn't know how to laugh and Saroyan was filled with sugar.
I don't know if this is true to you but for me sometimes it gets so bad that anything else say like looking at a bird on an overhead power line seems as great as a Beethoven symphony. then you forget it and you're back again.
Writers are nothing but beggars with a good line.
If you can't write the next line, well, you're dead. The past doesn't matter.
Sometimes I feel as if we are all trapped in a movie. We know our lines, where to walk, how to act, only there is no camera. Yet, we can't break out of the movie. And it's a bad one.