The wild doctrines of Thomas Miinzer and the Zwickau prophets, merging eventually into the excesses of the Peasants' War and the doings of the Anabaptists in Minster, first roused Luther to the dangerous possibilities of mysticism as a disintegrating force.
It is formed by the confluence, just below Kolditz, of the Zwickauer Mulde, which rising in the Vogtland of Saxony passes Zwickau, Glauchau and Rochlitz, and the Freiberger Mulde, which, rising in the Bohemian Erzgebirge, touches Freiberg, Dobeln and Leisnig.
In the other chief industrial region of Germany, in Saxony, Zwickau and Lugau, are important mining centres.
At this time three prophets arrived from Zwickau, eager to hasten the movement of emancipation.
These measures, and the excitement which followed the arrival of the radicals from Zwickau, led Luther to return to Wittenberg in March 1522, where he preached a series of sermons attacking the impatience of the radical party, and setting forth clearly his own views of what the progress of the Reformation should be.