I think we have already covered many things on this issue but am not sure whether other posters have some more needs. Personally I want to clarify some points raised by Bunyon, because I feel he showed us some different angle. Bonyon, would you mind showing us any site address if any, about Cyrill vs Nestorius? If possible we'd better have a correct history for the right discernment. I want to know the relationship between Cyrill and Nestorius, and the other attendants, previous relationship between 2 and the qualifications of both guys and the beliefs etc. Later on we may cover some rest of the main issue Mother of God theory!