The Diet of Regensburg ended in nothing but resolutions to continue the controversy at Worms, and fearing the objections of Canisius, who was known to feel great repugnance towards these public conferences with heretics which never came to any practical conclusion, Ferdinand sought to anticipate his refusal by obtaining a promise from Father Lainez that so able a defender of Catholic doctrine should also be present.
Canisius had already written to the general thus:—
"Knowing as I do my poverty of intellect, my great want of aptitude, and my incapacity, I confess that I should like to run away from this place, and would rather go and beg in India than involve myself in those dangerous disputes, out of which nothing can come but perpetual disgrace to religion, and great harm to the rights of the Church. But the Lord God will make known to me His will by His servant my Superior, and when I know it I shall have no further fear, but shall appear with boldness in the enemy's camp; for all my confidence and all my strength are in obedience. I can be nothing else but a beast of burden in the house of the Lord all the days of my life."
Father Lainez shared to the full the opinion of Canisius as to the uselessness of these conferences, which were exacted by the Lutherans in the hope of wresting something to their own temporal advantage, and the Pope differed from neither in his estimation of the small amount of good to be hoped from them. But as the Emperor was not to be restrained from granting concessions which all Catholics agreed were futile, it was extremely important that the interests of religion and the rights of the Holy See should be ably defended; and Father Lainez therefore insisted that Canisius should not only remain at the Diet of Regensburg to the bitter end, but that he should hold himself in readiness to reopen the campaign at Worms.
In the interval Canisius went to Rome to pay his respects to the new General, and on his return to Germany visited Munich. The capital of Bavaria was also a hot-bed of heresy, and after a brief sojourn there he wrote to Father Lainez, entreating that he would send some Fathers capable of attracting people by their sermons and of edifying them by the holiness of their lives. He then went to Ingolstadt, and was greatly consoled by the results that had been obtained by the newly founded college. Heresy no longer ventured to raise its head where formerly it had flaunted its colours unabashed, and in every respect the university was worthy of the care that had been bestowed upon it. The place was naturally dear to his heart, as the magnificent first-fruits of his labours for Germany, but tearing himself reluctantly from the piety and peace which he had so successfully planted there, he proceeded to confront the enemy at Worms.
The greater number of the Lutheran disputants had already arrived, but of the six Catholic theologians deputed to enter the lists against them, the most celebrated, Johann Gropper, Archdeacon of Cologne, was conspicuous by his absence. Canisius wrote to entreat him to come, but Gropper was so thoroughly convinced of the uselessness of the disputations, that he persistently refused to take part in them. The organisation of the whole matter therefore devolved on Canisius, who prepared the plan of defence, and appointed to each Catholic theologian the subject of which he was to treat. Besides this, he continued to preach, to hear confessions and to take counsel with his colleagues daily. At night he allowed himself but a brief interval of sleep, the rest of the time being spent in prayer and study.
He had stipulated before the opening of the conferences that none but those Protestants who belonged to the Confession of Augsburg, and who were the only regular, and to some extent, disciplined body among them should take part in the disputations. This condition had been accepted, but from the very beginning, Anabaptists, Sacramentarians, and heretics of every imaginable sect appeared, and claimed the right of speech. Those of the Augsburg Confession were furious, and refused to make common cause with the new arrivals. Recriminations, invectives, and threats were hurled about the Protestant camp till a formidable tumult ensued. The Augsburg Lutherans at last succeeded in turning out the other sects, but ashamed of the spectacle they had presented to the eyes of the Catholics who were all united, they left Worms secretly, and contented themselves with attacking each other in the usual vituperative terms.
"It was," wrote Canisius, "as if the giants of old were seeking to rebuild the Tower of Babel. God visited them with the same spirit of confusion which prevented their understanding one another, so that Melancthon was punished by the work of his own hands, like those who are devoured by the wild beasts which they have themselves bred up with great pains and difficulty."
Cologne, Strassburg, and his own native Nymwegen next came in for a share in the apostles' labours. The Bishop of Trent begged him to come and found a college in his diocese; the Duke of Bavaria called upon him to organise the one he had already set on foot at Munich, and to establish another at Landshut. But Straubing, by reason of its extreme need, detained him longer than any of these places.
Charles V. had himself been mainly responsible for the worst of the difficulties and complications that existed at Straubing, on account of his famous interim, which granted to all, on his own personal authority, permission to communicate under both kinds, pending the decision of the Council of Trent on this point. Straubing had availed itself without exception of the permission, and even after the decision of the Council persisted in retaining the custom. A few priests had attempted resistance, but numberless apostasies and half an insurrection had followed on their action, and now the position had come to be regarded as impregnable.