I'd forgotten this feeling. The feeling that comes with writing code to do something and knowing that it is "just right." Just right probably varies from person to person, and I'm not even sure how to describe it, but there is something about doing it right.
My project is not yet done, and in the moment, when the code flows and is what it is supposed to be, you lose your place in time and in the process. Engineering...art...creativity. I remember the pull to give up so much to commit myself to what I wanted to do. Even now, in a brief moment of goodness, it all makes sense again.