Though Flacius, when he first made his statement concerning the substantiality of original sin may not have felt absolutely sure of the exact meaning, bearing, and correctness of his position, yet the facts do not warrant the assumption that afterwards he was in any way diffident or wavering in his attitude. Whatever his views on this subject may have been before 1560—after the fatal phrase had fallen from his lips, he never flinched nor flagged in zealously defending it. Nor was he ever disposed to compromise the matter as far as the substance of his doctrine was concerned. In 1570 Spangenberg of Mansfeld, who sided with Flacius, suggested that he retain his meaning, but change his language: "Teneat Illyricus mentem, mutet linguam." To this Flacius consented. On September 28 1570, he published his Brief Confession, in which he agreed to abstain from the use of the term "substance." However, what he suggested as a substitute, viz., that original sin be defined as the nature of man (the word "nature," as he particularly emphasized, to be taken not in a figurative, but in its proper meaning), was in reality but another way of repeating his error.
The same was the case in 1572, when Flacius, opposed and sorely pressed by the ministerium of Strassburg (whence he was banished the following year), offered to substitute for the word "substance" the phrase "essential powers." (Preger 2, 371.) Two years later, at the public disputation in Langenau, Silesia, where Flacius defended his doctrine with favorable results for himself against Jacob Coler [born 1537; studied in Frankfort-on-the-Oder, 1564 pastor in Lauban, Upper Lausatia (Oberlausitz); 1573 in Neukirch; 1574 he opposed Leonard Crentzheim and Flacius; 1575 professor in Frankfort; afterwards active first as Praepositus in Berlin and later on as Superintendent in Mecklenburg, published Disputatio De Libero Arbitrio; died March 7, 1612], he declared that he did not insist on his phrase as long as the doctrine itself was adopted and original sin was not declared to be a mere accident. But this, too, was no real retraction of his error. (Preger 2, 387.) In a similar way Flacius repeatedly declared himself willing to abstain from the use of the word "substance" in connection with his doctrine concerning original sin, but with conditions and limitations which made his concessions illusory, and neither did nor could satisfy his opponents.
At the disputation in Weimar, 1560, Wigand and Musaeus, as stated, warned Flacius immediately after the session in which he had made his statement. Schluesselburg relates: "Immediately during the disputation, as I frequently heard from their own lips, Dr. Wigand, Dr. Simon Musaeus, and other colleagues of his who attended the disputation … admonished Illyricus in a brotherly and faithful manner to abstain from this new, perilous and blasphemous proposition of the ancient Manicheans, which would cause great turmoil in the Church of God, and to refute the error of Victorin [Strigel] concerning free will not by means of a false proposition, but with the Word of God. However, intoxicated with ambition, and relying, in the heat of the conflict, too much on the acumen and sagacity of his own mind, Illyricus haughtily spurned the brotherly and faithful admonitions of all his colleagues." (Catalogus 2, 4.) In his book De Manichaeismo Renovato Wigand himself reports: "Illyricus answered [to the admonition of his colleagues to abstain from the Manichean phrase] that he had been drawn into this discussion by his opponent against his own will. But what happened? Contrary to the expectations of his colleagues, Illyricus in the following session continued, as he had begun, to defend this insanity." (Preger 2, 324; Planck 4, 611.) However, it does not appear that after the disputation his friends pressed the matter any further, or that they made any efforts publicly to disavow the Flacian proposition.
In 1567 Flacius published his tract De Peccati Originalis aut Veteris Adami Appellationibus et Essentia, "On the Appellations and Essence of Original Sin or the Old Adam," appending it to his famous Clavis Scripturae of the same year. He had written this tract probably even before 1564. In 1566 he sent it to Simon Musaeus, requesting his opinion and the opinion of Hesshusius, who at that time was celebrating his marriage with the daughter of Musaeus. In his answer, Musaeus approved the tract, but desired that the term "substance" be explained as meaning not the matter, but the form of the substance to which Hesshusius also agreed. After the tract had appeared, Musaeus again wrote to Flacius, June 21, 1568, saying that he agreed with his presentation of original sin. At the same time, however, he expressed the fear that the bold statement which Flacius had retained, "Sin is substance," would be dangerously misinterpreted. (Preger 2, 327.) And before long a storm was brewing, in which animosity registered its highest point, and a veritable flood of controversial literature (one publication following the other in rapid succession) was poured out upon the Church, which was already distracted and divided by numerous and serious theological conflicts.
By the publication of this treatise Flacius, who before long also was harassed and ostracized everywhere, had himself made a public controversy unavoidable. In the conflict which it precipitated, he was opposed by all parties, not only by his old enemies, the Philippists, but also by his former friends. According to the maxim: Amicus Plato, amicus Socrates, sed magis amica veritas, they now felt constrained, in the interest of truth, to turn their weapons against their former comrade and leader. Flacius himself had made it impossible for his friends to spare him any longer. Nor did he deceive himself as to the real situation. In a letter written to Wigand he reveals his fear that the Lutherans and Philippists, then assembled at the Colloquium in Altenburg (held from October 21, 1568, to March, 1569, between the theologians of Thuringia and those of Electoral Saxony), would unite in a public declaration against his teaching. Wigand whose warning Flacius had disregarded at Weimar, wrote to Gallus: Flacius has forfeited the right to request that nothing be published against him, because he himself has already spread his views in print. And before long Wigand began to denounce publicly the Flacian doctrine as "new and prolific monsters, monstra nova et fecunda."
172. Publications Pro and Con.
According to Preger the first decided opposition to the Flacian teaching came from Moerlin and Chemnitz, in Brunswick, to whom Flacius had also submitted his tract for approval. Chemnitz closed his criticism by saying: It is enough if we are able to retain what Luther has won (parta tueri), let us abandon all desires to go beyond (ulterius quaerere) and to improve upon him. (Preger 2, 328.) Moerlin characterized Flacius as a vain man, and dangerous in many respects. Flacius answered in an objective manner, betraying no irritation whatever. (332.) In a letter of August 10, 1568, Hesshusius, who now had read the tract more carefully charged Flacius with teaching that Satan was a creator of substance, and before long refused to treat with him any further. In September of the same year Flacius published his Gnothi seauton against the attacks of the Synergists and Philippists, notably Christopher Lasius [who studied at Strassburg and Wittenberg, was active in Goerlitz, Greussen, Spandau, Kuestrin, Cottbus, and Senftenberg, wrote Praelibationes Dogmatis Flaciani de Prodigiosa Hominis Conversione; died 1572]. In the same year Hesshusius prepared his Analysis, which was approved by Gallus and the Jena theologians.
Realizing that all his former friends had broken with him entirely, Flacius, in January 1570, published his Demonstrations Concerning the Essence of the Image of God and the Devil, in which he attacked his opponents, but without mentioning their names. His request for a private discussion was bluntly rejected by the Jena theologians. Wigand, in his Propositions on Sin of May 5, 1570, was the first publicly to attack Flacius by name. About the same time Moerlin's Themata de Imagine Dei and Chemnitz's Resolutio appeared. The former was directed "against the impious and absurd proposition that sin is a substance", the latter, against the assertion "that original sin is the very substance of man, and that the soul of man itself is original sin." Hesshusius also published his Letter to M. Flacius Illyricus in the Controversy whether Original Sin is a Substance. Flacius answered in his Defense of the Sound Doctrine Concerning Original Righteousness and Unrighteousness, or Sin, of September 1, 1570. Hesshusius published his Analysis, in which he repeated the charge that Flacius made the devil a creator of substance.
In his Brief Confession, of September 28 1570, Flacius now offered to abstain from the use of the term "substance" in the manner indicated above. A colloquium, however, requested by Flacius and his friends on the basis of this Confession, was declined by the theologians of Jena. Moreover, in answer to the Brief Confession, Hesshusius published (April 21, 1571) his True Counter-Report, in which he again repeated his accusation that Flacius made the devil a creator of substance. He summarized his arguments as follows: "I have therefore proved from one book [Flacius's tract of 1567] more than six times that Illyricus says: Satan condidit, fabricavit, transformavit veterem hominem, Satan est figulus, that is: The devil created and made man, the devil is man's potter." The idea of a creation out of nothing, however, was not taught in the statements to which Hesshusius referred. (Preger 2, 348.)
Further publications by Andrew Schoppe [died after 1615], Wigand, Moerlin, Hesshusius, and Chemnitz, which destroyed all hopes of a peaceful settlement, caused Flacius to write his Orthodox Confession Concerning Original Sin. In this comprehensive answer, which appeared August 1, 1571, he declares "that either image, the image of God as well as of Satan, is an essence, and that the opposite opinion diminishes the merit of Christ." At the same time he complained that his statements were garbled and misinterpreted by his opponents, that his was the position of the man who asked concerning garlic and received an answer concerning onions, that his opponents were but disputing with imaginations of their own. (349f.)