I think Dennet (I may be mistaken) regarded the "soul" and perhaps the "mind" as "the narrative center of gravity of the self". I like this kind of metaphor, since it brings to mind a sort of "meaningful nonexistence" of centers-of-gravity (they don't really exist, except as mathematical constructions, artifices, of arbitrarily-selected and isolated objects in a pretend-space that exists independently of those objects, which isn't really accurate either) and allows us to speak constructively about the phenomenon of man without losing ourselves in "what actually is". To quote Neils Bohr yet again:

"It is wrong to think that the task of physics is to find out how nature is. Physics concerns what we can say about nature... Our task is not to penetrate into the essence of things, the meaning of which we don't know anyway, but rather to develop concepts which allow us to talk in a productive way about phenomena in nature."

I think, in that way, we can embrace a nonexistence of mind while still using the concepts surrounding the term without fear of contradiction or counterclaims that our approach is self-defeating.