As such differences and disputes arose on every side in the Evangelical Church, to its own injury and the joy of the Catholics, several princes, especially Maurice and the Landgrave of Saxony, thought it necessary to bring about a meeting of the Theologians, in order that these controversies might be settled. The Osiandrian difficulties were to be disposed of first, as they shook the very foundation of the Evangelical Church. The meeting was to be held in Erfurt, June, 1553; but Melanchthon did not expect any good from this, and freely declared his opinion that such conferences produced no good effects, as Gregory of Nazianzen had declared, "that he had not seen any Synods in his own day which did not cause greater dissension than existed before." He also said that there was no Theologian now who was able to restrain the others, as Luther had done in former days. That they ought to adhere to the Confession, on account of the Diet which should soon assemble. If the Emperor should insist upon the Interim, they should explain to him why they could not accept it. The Landgrave also entertained the same views.
This plan, which had been projected by Maurice, was postponed by a terrible disaster which fell upon him. The Margrave Albert continued to disturb the public peace by predatory excursions, which were especially directed against the monasteries of Franconia. Maurice therefore united with King Ferdinand, and Duke Henry, of Brunswick, to suppress this disturber. But when Albert heard of this design, he endeavored to anticipate them, and fell upon Lower Saxony. On the 9th of July, 1553, a battle was fought at Sievershausen. Maurice was victorious, but paid dearly for it, for he received a gun-shot wound in the battle, which caused his death two days afterwards. His last words were, "God will come!" He was succeeded by his brother Augustus, who restored the Misnian Lands in Thuringia and Franconia to the aged John Frederick. He was a sincere man, devotedly attached to Evangelical truth, and enjoying the full confidence of his subjects. Already, in the month of August, he came to Wittenberg, and Melanchthon rejoiced to hear the most encouraging promises from his own lips.
He confirmed the foundations which had been assigned for the support of the University by his brother Maurice. He also earnestly wished that the Theologians, who were not affording a very edifying and commendable example by their continued disputes, might become reconciled among themselves. This wish was shared by the pious Duke Christopher, of Wurtemberg; and he proposed a conference of the ministers at Weimar, in order that they might discuss these points of difference. It was agreed upon to hold a Synod at Naumburg. We have already heard that Melanchthon dreaded such a conference, because he believed it would only make matters worse. On the 17th of April, he wrote to a friend: "The Court orders us to go to Naumburg, whither, as they write to us, the Swabian and Hessian pastors will also come. Although they have been warned by so many examples, that synods and hypocritical unions are productive of great evils, yet they have ordered us to hold synods again." However, he also wrote to Maienburg, May 11th: "Although the Synod of Naumburg, which I always objected to, will meet, I must nevertheless attend it." He went, accompanied by Forster and Camerarius, and reached Naumburg May 20th, 1554. The Hessian delegates, and the well-known Sleidanus, of Strasburg, arrived on the following day, and Pacæus and Salmuth, of Leipzig, on the 23d of May.
Although Melanchthon at first entertained the greatest fears, because he expected those two violent champions, Gallus and Flacius, whom he called the two sons of Polyphemus, he now wrote to his son-in-law Peucer, as early as May 23d: "To-day we shall, with the help of God, deliberate in a friendly manner, and I hope that no disputes will arise among us. We shall not expect any other Theologians, if they do not arrive here within three days." The princes wished the Theologians to agree upon the answer to be given to the Emperor, at the next Diet. In a declaration, prepared by Melanchthon, the Theologians frankly say: "If his Imperial Majesty should wish us to adopt again the Papal doctrine, which we condemn, and the Interim also, we shall, by the grace of God, clearly and positively refuse to do so."
They continued to say, that Protestants should abide by the Confession delivered in Augsburg in 1530, because it contains "the only eternal agreement of the divine Scriptures, and the true catholic Church of Christ." Also, that the confession of Brentius, and that of Saxony, fully coincided with this. The Theologians also expressed themselves against the errors of Schwenkfeld and Osiander. Schwenkfeld, like all fanatics of ancient and modern days, disregarded the written word of God, and thought that God revealed himself to man without this. He also showed his perversion by other objections, which he raised against the Evangelical Church. They therefore say: "Therefore we unanimously reject the before-mentioned errors, and all the lies of Schwenkfeld." One of the greatest errors of Osiander is his declaration, "that man is not just on account of the obedience of Christ, but on account of the Deity if it dwells in man." They maintain the Evangelical doctrine against these Osiandrian heresies, in a very conclusive manner. In speaking of Ceremonies, they insist upon unity in doctrine and in the sacraments. They reject the mass without communicants. They allow private confession, "but no one is to be burdened by an enumeration of his sins." They wish holidays to be observed, and require uniformity in this. They oppose the reintroduction of Latin hymns, of the garments used in the mass, of vestments, and other ceremonies, "because it would give rise to new dissensions and ruptures." The authorities, and sensible Pastors, would know how to make a distinction between essentials and non-essentials, and how to avoid all offence. Attention should be paid to studies, ordination, consistories, and visitations, all which matters had formerly been disregarded by the Bishops. As the Bishops are persecutors of the pure doctrine, ordination cannot possibly be given into their hands. The authorities are bound to see to it, that the pure doctrine is preached in the churches, and that the consistories would discharge their duties, in punishing vice and maintaining discipline and harmony. Melanchthon was highly pleased with the harmony among the Theologians at Naumburg; yet he did not conceal the fact from himself, that his opponents would also raise a great outcry against the resolutions of Naumburg. The Theologians of Wurtemberg had only proceeded as far as Erfurt, for they had been expected for several days in Naumburg, but in vain. On the 28th of May, Melanchthon wrote to Strigel: "If the Swabians do not arrive to-day, as I believe they will not, we shall adjourn to-morrow, God willing." He returned to Wittenberg, as he had stated. Duke Christopher, however, was highly pleased with the resolutions of Naumburg.
During Melanchthon's stay in Dresden, February, 1555, where he was giving his opinion in regard to a visitation of the churches, the diet of Augsburg had been opened on the 5th of February. The Emperor had become completely disgusted with German affairs, particularly since the revolt of Maurice, and he now left the direction of this diet, promised in the treaty of Passau, to his brother Ferdinand. This diet witnessed many disputes, especially urged by the Pope's nuncio. But fortunately Pope Julius III. died about this time, and the nuncio was obliged to return to Rome. Now one principal difficulty was removed, and they at last, in the month of September, 1555, agreed upon the Religious peace of Augsburg, which was highly advantageous to the Protestants. For they not only obtained liberty of conscience in religion, but full civil equality with the Catholics, and remained in the possession of the ecclesiastical property which had been confiscated. But one unjust resolution was also carried, that if a Catholic sovereign should wish to become a Protestant at any future time, he should not indeed be personally molested on this account, but should forfeit his office and rank. Although the Protestants yielded very reluctantly, the decrees of the diet were of the utmost value to them, for they secured a lasting peace, and they no longer needed to care for the condemnations of a General Council. Melanchthon wrote: "I look upon the peaceful conclusion of the Diet of Augsburg as one of the favors of God, and we must beseech the Son of God to continue to guide us in future."
While the Evangelical Church was thus celebrating outward triumphs, and securing a firm position for herself, enemies were raging in her own bosom, who undoubtedly retarded her development. They were contending about a doctrine which is as plainly founded in the word of God, as it is of great comfort to the heart. It is the doctrine that not only the earthly elements of bread and wine, but also the true body and blood of Christ are distributed in the holy sacrament of the Lord's Supper. As a middle path between the doctrine of Transubstantiation on the one hand, and the one-sided doctrine of the Reformed, that we receive nothing but bread and wine in memory of the Lord, on the other, it was objectionable to the Catholics and the Reformed. Luther has triumphantly vindicated this consoling doctrine in his writings.
But now there arose another man with a doctrine somewhat different, which was adopted by many. This was the sagacious, learned, and pious John Calvin, who was born in the year 1509. The Lutherans had hitherto regarded him as belonging to their own party, especially since he had been teaching with Bucer and Capito in Strasburg. When he had returned to Geneva in 1541, from which city he had been banished before, and had there built up the Evangelical Church with great zeal, he wrote a Confession in regard to the Lord's Supper, in the year 1549. The Zurichers had formerly suspected him of being a Lutheran, but now all their doubts vanished, and they could call him their own, and harmony was completely restored between German and French Switzerland. But that which produced harmony in Switzerland caused dissensions in Germany, although not immediately. Here they had enough to dispute in regard to the so-called indifferent things, (Adiaphora,) and the heresies of Osiander.
In the year 1552, a pastor in Hamburg, named Joachim Westphal, published a work in which he proved that the Reformed had given no less than eight-and-twenty explanations of the words of institution in the Lord's Supper, from the time of Zwingli to that of Calvin. In the following year he published a work against Calvin, entitled: "The true faith in regard to the Lord's Supper." This publication began to arouse the zeal of the Lutherans against Calvin and his friends, which was still more inflamed by one John von Lasco, who, together with a band of French and Dutch Protestants, had been banished from England by that severe Romanist, Queen Mary. He had confessed himself a follower of Calvin, and therefore could not find a resting-place for himself and his friends, either in Denmark or Germany. They were denounced from the pulpits in every quarter. Calvin now published a work defending them and his doctrine. He declared that, according to his doctrine, the Lord's Supper was no empty ceremony, even though he did not believe in a participation of the body and blood of Christ, in and under the bread and wine. Westphal and John Timann, pastor in Bremen, arrayed themselves against Calvin; who, assisted by Bullinger of Zurich, and Lasco, soon published a refutation. Most of the cities of Lower Saxony sided with Westphal. The fire spread on every side, and Schnepf of Jena, Alber in Mecklenburg, and Eitzen in Hamburg, attacked Calvin in the most violent manner, who finally maintained an utter silence.
Calvin represented his own doctrine as a mediation between the Lutherans and the Reformed. It did not teach an imaginary, but a real participation of the body and blood of Christ, yet not with the mouth, and it also opposes the view of an Omnipresence of Christ according to his human nature. The fulness of the Godhead has entered into the body of Christ, and from this body the Lord fills his people spiritually, with a secret and mysterious power of life, whenever they receive the bread and wine. This participation only refers to believers, although it is also offered to unbelievers. So Calvin regarded the matter; but what did Melanchthon say to all this? He did not express himself positively in regard to either side, doubtless because he did not wish to pour fresh oil into the fire. Yet he was provoked and driven to a decided declaration of his sentiments by both sides. Gallus and Westphal published a collection of declarations taken from his former writings, by which they proved him to be on their side, and that he had at least not thought as the Sacramentarians did, as long as Luther was alive. Calvin also endeavored to lead him to declare himself, by stating that he understood the Augsburg Confession precisely as it was understood by its author, and that in this matter he could as little be separated from Philippus as from his own heart. We may admit, without hesitation, that Melanchthon agreed more with Calvin than with the stricter teachers of the Lutheran Church; but he did not wish to begin a conflict while he was the subject of a government which strictly adhered to Luther's doctrine. He wrote to Hardenberg in the beginning of 1556, that if his life should be spared he would reply in a place where the courts could not hinder him; and to his friend Mordeisen at the Saxon court, who reproached him on account of his bashfulness, he wrote: "I am certain that your court will not suffer a defence of the truth in this article." He therefore continued to adhere to the method of teaching he had pursued hitherto. He always spoke of a presence of Christ in the Lord's Supper, but never of a bodily presence of his body and blood.