Augustine of Hippo (attributed)

Because this situation had made the Galatians turn to the law, so as to confess one God without the mystery, as if it were inimical to the law for Christ to be called God, he says: "An arbiter (that is, a mediator) is not of one but of course of two. You however, having turned to the law, have rejected the arbiter. God, however, is one." By saying this, he bears witness that he is not preaching Christ in such a way as to make him another God or confess two but that there is one God, as the law itself attests.