Qualia and Chemicals

I think it might be useful to insert a distinction here between "it's just chemicals" and "it's real."  Chemicals are real enough, and there is a reason the chemicals are there, but the presence of the chemicals might not be the cause but a result.

What we do think we know is that we "experience" things (known as "qualia" -- emotions, sensations, an ongoing narrative of the world).  It has been realized by introspective people from ancient times that none of this can possibly be "real" in the usual and intuitive sense of the world -- that our experience is not real but generated somewhere -- moderns assume in the brain.  About the best we can say is that the ongoing narrative of our experience is a useful interface between the outside world and ourselves -- like the odometer on a car is not "real speed" but just an interface telling us about the car's real speed.