In his new book The Experience of God: Being, Consciousness, Bliss, David Bentley Hart notes that during the medieval era almost nobody thought that "the relation of soul and body was anything like a relation between two wholly independent kinds of substance: the ghost and its machine (which for what it is worth, was not really Descartes understanding of the relation either). (p. 168)" This is interesting to me because one of the chief critiques I had heard of Descartes is that he posited that humans are primarily "thinking things" and the mind interacts with the body almost incidentally. But I had always been intrigued when I read Descartes third meditation he notes this, "For since I am nothing but a thinking thing, or at least, since I am now dealing simply and precisely with the part of me that is a thinking thing, if such a power were in me [the power to create oneself from nothing], then I would surely be aware of it. (Third Meditation paragraph 49)"