What answer should the reformer give to so pressing an invitation? In his acknowledgment of Sturm's letter, Melanchthon confessed that no deliberation had ever occasioned him so much perplexity. It was not that domestic ties retained him or dangers deterred him. But he was harassed by the fear that he would be unable to accomplish any good. If only this doubt--amounting almost to _despair_--could be removed, he would fly to France without delay. He approved--so he assured his correspondent--of checking those fanatics who were engaged in sowing absurd and vile doctrines, or created unnecessary tumults. But there were others against whom no such charge could be brought, but who modestly professed the Gospel. If through his exertions some slight concessions were obtained, while points of greater importance were sacrificed, he would benefit neither church nor state. What if he secured immunity from punishment for such as had laid aside the monk's cowl? Must he then consent to the execution of those conscientious men who disapproved of the evident abuses of the mass and of the worship of the saints? Now, as it was precisely the expression of this disapprobation that had caused the present massacres, he trembled with fear lest he should be put in the position of one that justified these atrocious severities. In short, it was his advice, he said, in view of the cunning devices by which the "phalanxes" of monks were wont to play upon the hopes and fears of the high-born, that Francis, if honestly desirous of consulting the glory of Christ, and the tranquillity of the church, be rather exhorted to assemble a general council. Other measures appeared to him, not only useless, but fraught with peril.[367] [Sidenote: Formal invitation from the king.] At this point the king himself took a direct part in the correspondence. On the twenty-third of June, 1535, he sent Melanchthon a formal request to visit his court, and there dispute, in his presence, with a select company of doctors, concerning the restoration of doctrinal unity and ecclesiastical harmony. He assured the reformer that he had been prompted by his own great zeal to despatch Voré with this letter--itself a pledge of the public faith--and besought him to suffer no one to persuade him to turn a deaf ear to the summons.[368] Sturm, Cardinal du Bellay, and his brother, all wrote successively, and urged Melanchthon to come to a conference from which they hoped for every advantage.[369] [Sidenote: Melanchthon consents.]