I think an idealist would say that the material is a manifestation of the spiritual. The word was made flesh, and the flesh was good, at least up until 35 or so.
Like if you built a house, you conceived of it's design. Going even further back, you had a notion to start thinking about building a house. Where do these notions spring from? Seems like the essential difference between a being and a thing.
I don't see it as implying any sort of Oneness or God but seems like we posses an intellectual animation that even a brain scan, which can image the physicality of thoughts once existing, can't explain the origin of.
I agree that there is a horniness on the part of the non-physical toward the physical. I suspect this is why a lot of origin myths involve congress between sky and earth, the tangible and the ethereal.