I find it interesting that the former Archbishop of Canterbury, Lord Carey, would make this statement, ''The honourable estate of matrimony precedes both the state and the church, and neither of these institutions have the right to redefine it in such a fundamental way.'' Apparently he is too blinded by his own self-righteous bigotry to see the hypocrisy. He doesn't think anyone should "redefine" marriage but he is certainly fine with forcing his preferred definition on everyone else.
I do agree that the church has no right to tell the state how to handle civil marriages. This is not, of course, his real aim. I wish it was. If the religious bigots who oppose marriage equality would get it through their thick skulls that we don't give a shit what they do in their places of worship maybe they'll leave the rest of us alone. I doubt it but it is a nice thought.