A "meta-argument" against all future arguments for God's existence ?

[Belacqua]

But he's at least partly responsible for the paradigmatic equation of the two.

I still don't see how.

Of course he's responsible for substance dualism. But that doesn't mean that for him mind and soul are the same, or that substance dualism points to this.

Aristotle would say that both mind and body are determined by soul. 

Plotinus would say that consciousness is the portion of the world which is currently present to an individual's mind, but that mind itself goes much further. As with Nagarjuna and other eastern guys, he says that the division between mind and not-mind is an illusion, so that the tiny amount we are conscious of is far from full mind. 

Freud sort of modernizes this, to say that consciousness is only a part of mind. 

Jung uses soul to refer to the whole of the human combination of conscious mind, two levels of unconscious mind, all types of emotion and emotional complexes -- that is, mind, consciousness, and soul are all separate terms with separate meanings. 

Anyway, all the words mean different things, and fuzzing them all up just makes our thinking less clear.