On one point, however, they differed; and this difference led to an acrimonious contest, quite disgraceful to Luther, and the greatest blot on his character, inasmuch as it developed, to an extraordinary degree, both obstinacy and dogmatism, and showed that he could not bear contradiction or opposition. The quarrel arose from a difference of views respecting the Lord's supper, Luther maintaining not exactly the Roman Catholic doctrine of transubstantiation, but something approximating to it--even the omnipresence of Christ's body in the sacred elements. He relinquished the doctrine of the continually repeated miracle, but substituted a universal miracle, wrought once for all. In his tenacity to the opinions of the schoolmen on this point, we see his conservative spirit; for he did not deny tradition, unless it was expressly contradicted by Scripture. He would have maintained the whole structure of the Latin church, had it not been disfigured by modern additions, plainly at variance with the Scriptures; and so profoundly was he attached to the traditions of the church, and to the whole church establishment, that he only emancipated himself by violent inward storms. But Zwingle had not this lively conception of the universal church, and was more radical in his sympathies. He took Carlstadt's view of the supper, that it was merely symbolic. Still he shrunk from a rupture with Luther, which, however, was unavoidable, considering Luther's views of the subject and his cast of mind. Luther rejected all offers of conciliation, and, as he considered it essential to salvation to believe in the real presence of Christ in the sacrament, he refused to acknowledge Zwingle as a brother. Zwingle, nevertheless, continued his reforms, and sought to restore, what he conceived to be, the earliest forms in which Christianity had manifested itself. He designed to restore a worship purely spiritual. He rejected all rites and ceremonies, not expressly enjoined in the Bible. Luther insisted in retaining all that was not expressly forbidden. And this was the main point of distinction between them and their adherents.