But every higher development produces new defects; the child is free from many complaints which attack the youth. Protestantism, which had done so much for the people, did not for a long time achieve its greatest results. It required the unceasing inward workings of the minds of individuals; it gave an impulse everywhere to self-decision, and yet it could not raise itself above the worst principles of the old Church. It wished still to dominate over the faith of its disciples and to persecute as heresy every deviation from its convictions. Luther's giant nature had been able to keep zealous spirits united, but he himself had predicted that after his death they would not remain so. He knew his faithful adherents accurately; their weaknesses, and their eagerness to carry out their own views. Melancthon, who though firm in his theology and in the every-day troubles of life, was embarrassed and uncertain in matters of great import, could not command the fiery spirits of more determined characters. At that Imperial Diet which was held at Augsburg in 1547, the victorious Emperor had endeavoured, in his way, to compose the disputes of the Churches, and had pressed upon the vanquished Protestants a preliminary formula of faith, called the Interim. From the point of view of the Roman Catholics, it was considered as extreme toleration, which was only bearable because it gradually led back to the Old Church; from the point of view of zealous Protestants, it was held to be insupportable tyranny, which ought to be withstood. The ecclesiastical leaders of the opposition rose everywhere against this tyranny; hundreds of preachers were driven from their benefices and went about with their staffs as miserable pilgrims, and many fell victims to the furious reaction. It was the heroic time of the Protestant faith; simple preachers, fathers with wives and children, manfully suffered for their convictions, and were soon followed by thousands of laity. But this enthusiasm was fraught with danger. The Interim was the beginning of vehement theological disputes, even among Luther's followers. The struggle of individuals became also the struggle of the Universities. The successors of Frederick the Wise lost the University of Wittenberg as well as the Electoral dignity; Melancthon and the Wittenbergers were under the influence of Maurice and his brothers; while the most zealous Lutherans were assembled at the new University of Jena.