I don't know why it works. I don't have any special, technological reason for it. But when you come up against resistance when you're writing, you're onto something marvellous. The most important thing at this point is not following your manuscript plan. It's not beating your characters into submission. And it's certainly not saying: "Oh my gosh, I simply can't let this happen. That cannot happen in this book."
When a teacher trains a singer, and that student is coming up to a high note, why does the high note often fail at first? It's because the student stopped themselves. They didn't let it happen. They didn't go with the movement, with the natural impulse of the body that God gave them.
When a book fails, what went wrong? I believe - and this is just my opinion - that it is because the author didn't let it happen. The author was too controlling, and they just got in the way.
I know that whenever I'm just about driven to tears over a passage, or when I want to give up or do something else, or when I'm tempted just to knock my main character out and let the action play out off screen, that I am about to write a really great scene. If I ignore all these temptations and push through, I will have written some of my best work and potentially have turned the entire book around. I will be a stronger and better writer as a result.
This little post is for all those authors who had moments when they thought they simply couldn't make it - they didn't think they could write any further unless they browbeat their characters. Or, they just didn't write any further. You can do it. Push through. Push past the resistance. On the other side, you will find real art.