The Elector Frederick had declared that he would allow the bishops to preach freely in his states, but that he would deliver no one into their hands. Accordingly, the evangelical teachers, persecuted in other countries, soon took refuge in Saxony. Ibach of Frankfort, Eberlin of Ulm, Kauxdorf of Magdeburg, Valentine Mustœus, whom the canons of Halberstadt had horribly mutilated,[234] and other faithful ministers, coming from all parts of Germany, fled to Wittemberg, as the only asylum in which they could be secure. Here they conversed with the reformers; at their feet they strengthened themselves in the faith; and communicated to them their own experience and the knowledge they had acquired. It is thus the waters of the rivers return by the clouds from the vast expanse of the ocean, to feed the glaciers whence they first descended to the plains. [234] Aliquot ministri canonicorum, capiunt D. Valentinum Mustæum et vinctum manibus pedibusque, injecto in ejus os freno, deferunt per trabes in inferiores cœnobii partes, ibique in cella cerevisiaria eum castrant. Hamelmann, Historia renati Evangelii, p. 880. The work which was evolving at Wittemberg, and formed in this manner of many different elements, became more and more the work of the nation, of Europe, and of Christendom. This school, founded by Frederick, and quickened by Luther, was the centre of an immense revolution which regenerated the Church, and impressed on it a real and living unity far superior to the apparent unity of Rome. The Bible reigned at Wittemberg, and its oracles were heard on all sides. This academy, the most recent of all, had acquired that rank and influence in Christendom which had hitherto belonged to the ancient university of Paris. The crowds that flocked thither from every part of Europe made known the wants of the Church and of the nations; and as they quitted these walls, now become holy to them, they carried back with them to the Church and the people the Word of Grace appointed to heal and to save the nations. [Sidenote: LUTHER'S SENTIMENTS.]