The two men who lead us from the East to the West, and with whom we must deal first, are Tertullian and Cyprian. We already discussed Tertullian to some extent in connection with the Montanistic movement of radical spiritualism and radical eschatology. He was its greatest theological representative. We also spoke about him in connection with his ability to create those formulas which finally survived, in a very early stage, those formulas about Trinity and Christology which, under the pressure of Rome, finally conquered all the other suggestions made by the East.