Such a compromise was sure to be fruitless, for the champions of the church could not let the heretic rest for a moment. The whole affair was given a wider publicity than it had hitherto attained, and at the same time Luther was pushed to a more advanced position than he had yet reached, by the attack of a theologian of Ingolstadt, John Eck. When he assailed the Theses on the ground that they seriously impaired the authority of the Roman see, Luther retorted: {69} The assertion that the Roman Church is superior to all other churches is proved only by weak and vain papal decrees of the last four hundred years, and is repugnant to the accredited history of the previous eleven hundred years, to the Bible, and to the decree of the holiest of all councils, the Nicene. [Sidenote: The Leipzig Debate, 1519] A debate on this and other propositions between Eck on the one side and Luther and his colleague Carlstadt on the other took place at Leipzig in the days from June 27 to July 16, 1519. The climax of the argument on the power of popes and councils came when Eck, skilfully manoeuvring to show that Luther's opinions were identical with those of Huss, forced from his opponent the bold declaration that "among the opinions of John Huss and the Bohemians many are certainly most Christian and evangelic, and cannot be condemned by the universal church." The words sent a thrill through the audience and throughout Christendom. Eck could only reply: "If you believe that a general council, legitimately convoked, can err, you are to me a heathen and a publican." Reconciliation was indeed no longer possible. When Luther had protested against the abuse of indulgences he did so as a loyal son of the church. Now at last he was forced to raise the standard of revolt, at least against Rome, the recognized head of the church. He had begun by appealing from indulgence-seller to pope, then from the pope to a universal council; now he declared that a great council had erred, and that he would not abide by its decision. The issue was a clear one, though hardly recognized as such by himself, between the religion of authority and the right of private judgment. His opposition to the papacy developed with extraordinary rapidity. His study of the Canon Law made him, as early as March, 1519, brand the pope as either Antichrist or Antichrist's apostle. He {70} applauded Melancthon, a brilliant young man called to teach at Wittenberg in 1518, for denying transubstantiation. He declared that the cup should never have been withheld from the laity, and that the mass considered as a good work and a sacrifice was an abomination. His eyes were opened to the iniquities of Rome by Valla's exposure of the Donation of Constantine, published by Ulrich von Hutten in 1519. After reading it he wrote: