Erasmus had thus, at last, openly taken sides. For, apart from the dogmatical point at issue itself, the most important part about De libero arbitrio was that in it he had expressly turned against the individual religious conceptions and had spoken in favour of the authority and tradition of the Church. He always regarded himself as a Catholic. 'Neither death nor life shall draw me from the communion of the Catholic Church,' he writes in 1522, and in the Hyperaspistes in 1526: 'I have never been an apostate from the Catholic Church. I know that in this Church, which you call the Papist Church, there are many who displease me, but such I also see in your Church. One bears more easily the evils to which one is accustomed. Therefore I bear with this Church, until I shall see a better, and it cannot help bearing with me, until I shall myself be better. And he does not sail badly who steers a middle course between two several evils.'
But was it possible to keep to that course? On either side people turned away from him. 'I who, formerly, in countless letters was addressed as thrice great hero, Prince of letters, Sun of studies, Maintainer of true theology, am now ignored, or represented in quite different colours,' he writes. How many of his old friends and congenial spirits had already gone!
A sufficient number remained, however, who thought and hoped as Erasmus did. His untiring pen still continued to propagate, especially by means of his letters, the moderating and purifying influence of his mind throughout all the countries of Europe. Scholars, high church dignitaries, nobles, students, and civil magistrates were his correspondents. The Bishop of Basle himself, Christopher of Utenheim, was a man after Erasmus's heart. A zealous advocate of humanism, he had attempted, as early as 1503, to reform the clergy of his bishopric by means of synodal statutes, without much success; afterwards he had called scholars like Oecolampadius, Capito and Wimpfeling to Basle. That was before the great struggle began, which was soon to carry away Oecolampadius and Capito much further than the Bishop of Basle or Erasmus approved. In 1522 Erasmus addressed the bishop in a treatise De interdicto esu carnium (On the Prohibition of eating Meat). This was one of the last occasions on which he directly opposed the established order.
The bishop, however, could no longer control the movement. A considerable number of the commonalty of Basle and the majority of the council, were already on the side of radical Reformation. About a year after Erasmus, Johannes Oecolampadius, whose first residence at Basle had also coincided with his (at that time he had helped Erasmus with Hebrew for the edition of the New Testament), returned to the town with the intention of organizing the resistance to the old order there. In 1523 the council appointed him professor of Holy Scripture in the University; at the same time four Catholic professors lost their places. He succeeded in obtaining general permission for unlicensed preaching. Soon a far more hot-headed agitator, the impetuous Guillaume Farel, also arrived for active work at Basle and in the environs. He is the man who will afterwards reform Geneva and persuade Calvin to stay there.
Though at first Oecolampadius began to introduce novelties into the church service with caution, Erasmus saw these innovations with alarm. Especially the fanaticism of Farel, whom he hated bitterly. It was these men who retarded what he still desired and thought possible: a compromise. His lambent spirit, which never fully decided in favour of a definite opinion, had, with regard to most of the disputed points, gradually fixed on a half-conservative midway standpoint, by means of which, without denying his deepest conviction, he tried to remain faithful to the Church. In 1524 he had expressed his sentiments about confession in the treatise Exomologesis (On the Way to confess). He accepts it halfway: if not instituted by Christ or the Apostles, it was, in any case, by the Fathers. It should be piously preserved. Confession is of excellent use, though, at times, a great evil. In this way he tries 'to admonish either party', 'neither to agree with nor to assail' the deniers, 'though inclining to the side of the believers'.
In the long list of his polemics he gradually finds opportunities to define his views somewhat; circumstantially, for instance, in the answers to Alberto Pio, of 1525 and 1529. Subsequently it is always done in the form of an Apologia, whether he is attacked for the Colloquia, for the Moria, Jerome, the Paraphrases or anything else. At last he recapitulates his views to some extent in De amabili Ecclesiae concordia (On the Amiable Concord of the Church), of 1533, which, however, ranks hardly any more among his reformatory endeavours.
On most points Erasmus succeeds in finding moderate and conservative formulae. Even with regard to ceremonies he no longer merely rejects. He finds a kind word to say even for fasting, which he had always abhorred, for the veneration of relics and for Church festivals. He does not want to abolish the worship of the Saints: it no longer entails danger of idolatry. He is even willing to admit the images: 'He who takes the imagery out of life deprives it of its highest pleasure; we often discern more in images than we conceive from the written word'. Regarding Christ's substantial presence in the sacrament of the altar he holds fast to the Catholic view, but without fervour, only on the ground of the Church's consensus, and because he cannot believe that Christ, who is truth and love, would have suffered His bride to cling so long to so horrid an error as to worship a crust of bread instead of Him. But for these reasons he might, at need, accept Oecolampadius's view.
From the period at Basle dates one of the purest and most beneficent moral treatises of Erasmus's, the Institutio Christiani matrimonii (On Christian Marriage) of 1526, written for Catherine of Aragon, Queen of England, quite in the spirit of the Enchiridion, save for a certain diffuseness betraying old age. Later follows De vidua Christiana, The Christian Widow, for Mary of Hungary, which is as impeccable but less interesting.
All this did not disarm the defenders of the old Church. They held fast to the clear picture of Erasmus's creed that arose from the Colloquies and that could not be called purely Catholic. There it appeared only too clearly that, however much Erasmus might desire to leave the letter intact, his heart was not in the convictions which were vital to the Catholic Church. Consequently the Colloquies were later, when Erasmus's works were expurgated, placed on the index in the lump, with the Moria and a few other works. The rest is caute legenda, to be read with caution. Much was rejected of the Annotations to the New Testament, of the Paraphrases and the Apologiae, very little of the Enchiridion, of the Ratio verae theologiae, and even of the Exomologesis. But this was after the fight against the living Erasmus had long been over.
So long as he remained at Basle, or elsewhere, as the centre of a large intellectual group whose force could not be estimated, just because it did not stand out as a party—it was not known what turn he might yet take, what influence his mind might yet have on the Church. He remained a king of minds in his quiet study. The hatred that was felt for him, the watching of all his words and actions, were of a nature as only falls to the lot of the acknowledged great. The chorus of enemies who laid the fault of the whole Reformation on Erasmus was not silenced. 'He laid the eggs which Luther and Zwingli have hatched.' With vexation Erasmus quoted ever new specimens of narrow-minded, malicious and stupid controversy. At Constance there lived a doctor who had hung his portrait on the wall merely to spit at it as often as he passed it. Erasmus jestingly compares his fate to that of Saint Cassianus, who was stabbed to death by his pupils with pencils. Had he not been pierced to the quick for many years by the pens and tongues of countless people and did he not live in that torment without death bringing the end? The keen sensitiveness to opposition was seated very deeply with Erasmus. And he could never forbear irritating others into opposing him.