User blog comment:Kajune/Lucifer, first son?/@comment-81.62.106.88-20160412095945

I have the theory that Amara isn't talking to Lucifer but actually to castiel. Seen as God has revived Castiel multiple times he seems to be at least among his favourites. Nobody ever mentioned how old Castiel actually is, only a few hints were given. I thing it's possible that castiel was God's first son and not the archangels.