Perhaps he is referring to what we might call the "argument from incorporeality." The mind is incorporeal, and thus could not have come from nature. So there exists something beyond nature from whence this incorporeal thing, the self, came.
No, I am not saying that. The mind could have very well have come from nature, but nature came from God, is my belief.
But it is more the spirit, the one I feel God gave me, and my soul.
Where in the body these things reside, remains to be seen. But I feel the difference between my spirit and soul, unless I am just schizophrenic. Like Slim shady, there is 3 sides to him.
But then there is always the question of if your mind gets damaged, does this affect your soul/spirit? I would say it affects your soul, but not your spirit. I have damaged my own mind enough, but yet my spirit remains unchanged.