Board Thread:Theories Discussion/@comment-13376834-20130430230244/@comment-26871067-20150810030137

I could definitely be misunderstanding this information, but it seems like it might be that H&G used the energy of the Original Sin to create the vessels, which were then occupied by the god kin that had been freed from Sin and incarnated as demons.

Irina could be wrong about it, but she seems pretty certain that Seth convinced them to occupy the vessels - and the Sins weren't mentioned before Eve committed the Original Sin because the god kin that came to embody them were still trapped in Sin.