This is nothing new. I've said this many times before. A good book is the single biggest motivator to keep writing. It might be the tone of the story or the narrator's original voice or maybe just a couple of passages that fill me up with that feeling only written words can give you. That feeling that makes me think, wow, that's exactly how I would be feeling if I were in that situation. The ability to make a reader feel that way is probably a writer's greatest gift.
It makes me want to try to make someone feel that way, too.