During the negotiations in the presence of Cajetan at Augsburg we can see even more clearly how Luther stood under the spell of his idea, that the only Church was a spiritual one, and that, even should he break away from ecclesiastical authority by rising against the Ban, he would still remain in this Church.

It was after his return from Augsburg, during the stormy days when he appealed “from the Pope to a General Christian Council,” i.e. in the winter of 1518, that he discovered the true “Antichrist” who reigned at Rome.[1121] This discovery deprived him of the last vestige of respect for the authority of the Church and for her head.[1122] His own inward state when he made this discovery was one of curious turmoil. In his letter to Link, of Dec. 11, 1518, we hear him speaking of his commotion of mind, of new projects just on the point of birth which would show that, so far, he had hardly made a serious beginning with the struggle; he had a “premonition” then that Antichrist described by St. Paul (2 Thes. ii. 3 ff.) was seated in Rome where he behaved even worse than the Turk.[1123] At the beginning of 1519 with bated breath he announced to his friends the impending war on all the Papal ordinances.[1124]

Thus, even previous to the Leipzig Disputation, he must have busied himself with his new idea of the Church.

It was, however, only during the Disputation that, pressed hard by Eck, he was induced to deny openly the Primacy and to proclaim his belief in an invisible Church controlled by no authority.[1125] In the Disputation on July 4 and the following days, he attacked the divine institution of the Pope’s authority, asserted that even Œcumenical Councils could err, and, on July 6, declared that the Council of Constance had actually done so in rejecting the doctrine of Hus that there is “a Holy Catholic Church which is the whole body of the elect.”

In thus cutting the idea of the Church to his own measure, Luther had reached the Husite theory of the predestined as the sole members of the Church. “Luther found in this his own view of the Church, for, according to him, on the one hand there was no need of submission to Rome, and, on the other, only the real Christians and the elect were actual members of the Church.”[1126] In the “Resolutions,” which he published at the end of August immediately after the Disputation, he adheres to the statement that even Œcumenical Councils had erred and that, even on the most important questions of the faith. Still, strange to say, he does not think there is any reason for fearing that the Church had been forsaken by the Spirit of Christ, for by the Church was to be understood neither the Pope nor a Council.[1127] Here we have the basis of his new idea of the Church.… It is combined with another idea towards which he had long been drifting, viz. of seeing in Holy Scripture the sole source of faith.[1128] In the “Resolutions” he says: “Faith does not spring from any external authority but is aroused in the heart by the Holy Ghost, though man is moved thereto by the Word and by example.”[1129] Wherever Luther’s doctrine is believed, there is the Church.[1130]

The Papal Bull of 1520 condemned among the other selected theses of Luther’s, his attack on the Primacy and the Councils, though saying nothing of his doctrine of the Church, then still in process of growth. “The Roman Pope, the successor of Peter,” so the 25th of these condemned Theses runs, “is not the Vicar of Christ set over all the Churches throughout the whole world and appointed by Christ Himself in the person of St. Peter.” And the 29th declares: “It is open to us to set aside the Councils, freely to question their actions and judge their decrees and to profess with all confidence whatever appears to be the truth whether it has been approved or reproved of any Council.”[1131]

The originator of principles so subversive to all ecclesiastical order had perforce to reassure himself by claiming freedom in the interpretation of Scripture.

Hence, for himself and all who chose to follow him, he set up in the clearest and most decided terms the personal reading of the written Word of God, above all tradition and all the pronouncements of the teaching office of the Church; in this he went much further than he had done hitherto in the questions he had raised concerning justification, grace, indulgences, etc. It is easy to understand why it was so necessary for him to claim for himself a direct enlightenment by the Spirit of God in his reading of the Bible;[1132] in no other way could he vindicate his daring in thus setting himself in opposition to a Church with a history of 1500 years. At the same time he saw that this same gift of illumination would have to be allowed to others, hence he declared that all faithful and devout readers of the Bible enjoyed a certain kind of inspiration, all according to him being directly guided by the Spirit into the truth without any outward interference of Church doctrine, though the first fruits of revelation belonged to him alone.[1133]

By thus exalting the personal element into a principle, he dealt a mortal blow at the idea of a Church to whom was committed the true interpretation of doctrine.