The substantial harmony revealed in the fourteen articles which they all could sign showed that the Germans and the Swiss had one faith. But Luther insisted that their difference on the Sacrament of the Supper prevented them becoming one visible brotherhood, and the immediate purpose of the Landgrave of Hesse was not fulfilled. Undaunted by his defeat, Philip next attempted a less comprehensive union. If Luther and Zwingli could not be included within the one brotherhood, might not the German cities of the south and the Lutheran princes be brought together? Another conference was arranged at Schwabach (October 1529), when a series of theological articles were to be presented for agreement. Luther prepared seventeen articles to be set before the conference. They were based on the Marburg Articles; but as Luther had stated his own doctrine of the Holy Supper in its most uncompromising form, it is not to be wondered at that the delegates from the southern cities hesitated to sign. They said that the confession (for the articles took that form) was not in conformity with the doctrines preached among them, and that they would need to consult their fellow-citizens before committing them to it. Thus Philip’s attempts to unite the Protestants of Germany failed a second time, and a divided Protestantism awaited the coming of the Emperor, who had resolved to solve the religious difficulty in person. § 5. The Emperor in Germany. Charles V. was at the zenith of his power. The sickly looking youth of Worms had become a grave man of thirty, whose nine years of unbroken success had made him the most commanding figure in Europe. He had quelled the turbulent Spaniards; he had crushed his brilliant rival of France at the battle of Pavia; he had humbled the Pope, and had taught His Holiness in the Sack of Rome the danger of defying the Head of the Holy Roman Empire; and he had compelled the reluctant Pontiff to invest him with the imperial crown. He had added to and consolidated the family possessions of the House of Hapsburg, and but lately his brother Ferdinand had won, in name at least, the crowns of Bohemia and Hungary. He was now determined to visit Germany, and by his personal presence and influence to end the religious difficulty which was distracting that portion of his vast dominions. He also meant to secure the succession to the Empire for his brother Ferdinand, by procuring his election as King of the Romans.