What has "nature used to impress a notion of gods on our minds" if not the very images of the gods that come from their bodies?
Yep I think that is definitely the question, but even as I argue for the realist position I am not sure that the question is answered very easily.
Do we have notions of "atoms" impressed on our minds even though we have never seen them?
Do we have notions of "justice" impressed on our minds even though justice is an abstract concept which cannot be seen in bodily form?