Playing the Cartesian Theater

 From Daniel Dennett's From Bacteria to Bach and Back, p. 185:

The problem with introspection is that it acquiesces in the illusion that there is an inner eye that sees and an inner ear that hears—and an inner mind that just thinks—these intimately familiar items, the objects of consciousness that parade across the stage in the Cartesian Theater (Dennett 1991). There is no Cartesian Theater; there just seems to be a Cartesian Theater. There fo indeed seem to be these items, audible and visible and thinkable, and—setting magic aside—it couldn't seem so unless there really were physical tokens in the brain playing these roles, but how, physically, anything in the brain manages to play any of these roles is a topic for future scientific investigation, not introspection.