“For the civil government can give no new right to the church, nor the church to the civil government. So that, whether the magistrate join himself to any church, or separate from it, the church remains always as it was before — a free and voluntary society. It neither requires the power of the sword by the magistrate’s coming to it, nor does it lose the right of instruction and excommunication by his going from it. This is the fundamental and immutable right of a spontaneous society — that it has power to remove any of its members who transgress the rules of its institution; but it cannot, by the accession of any new members, acquire any right of jurisdiction over those that are not joined with it.”