It's a trendy idea, but still wrong, to talk about "the spiritual self".

We are meant to be integrative, wholly body, mind, will, spirit, working orderly and coherently in a reinforcing fashion toward the good and the true (which themselves are a union). 

To the extent that we are not, we suffer from various forms of disorders, including some mental disorders. 

To the extent that we talk about "the spiritual self" (and other selfs) we are subtly encouraging...a "disunion" within persons.

Let's eschew the trendy and superficial, and instead reform our bad use of concepts, which do have profound effects.

Ideas have consequences.