Conway Asks a Series of Questions About the Spirit: "Why

Conway asks a series of questions about the spirit: "Why does it require a corporeal eye so wonderfully formed and organized, that I can see by it? Why does it need a corporeal light, to see corporeal objects? Why is it requisite, that the image of the object should be sent to it, through the eye, that it may see it?" Conway uses this to support the following claim: Spirit and body are originally in their first substance but one and the same thing.