The self is really an afterthought, a retrospective construction out of the elements already present, and adding nothing to them, not even a hint of mystery. It is as essential as the origin in Cartesian coordinates, which originates nothing at all, and is at best a temporary and practical convention. A world is a product of differences, and so these differences cannot be members of the world, but only represented in it. There is, however, nothing prior to represent them and so they seem to represent themselves. This reflexivity is generally spoken of in the language of mind, or rather, the language of mind is the way in which we speak of this reflexivity.