conflict fought which led to the world-historic breach. Luther can be interpreted without Calvin, but not Calvin without Luther. To a great extent Calvin entered upon the harvest of what the hero of Wittenberg had sown in and outside Germany. But when the question is put, Who had the clearest insight into the reformatory principle, worked it out most fully, and applied it most broadly, history points to the Thinker of Geneva and not to the Hero of Wittenberg. Luther as well as Calvin contended for