Next morning, I romped through the rest of the chapter, easy as winking. I woke up thinking the worst was over and feeling optimistic. If I had given in the night before, I would have yet to face the difficulty.
It may well be that the whole thing gets redrafted and I end up editing out the chunk that gave me the most grief. It won't matter. What would matter is if I hung on to it because it gave me grief. It would be a poor book indeed if the reader could plot where the author got into trouble along the way.