When Madame de Krüdener had lived in the edifying company of Fontaines and Marie Kummer for fully eight months, Fontaines began to feel that he was no longer safe in Markirch. Tales of his past life were being circulated. Marie Kummer consequently had a vision in which she received a divine command to go to Würtemberg and found a colony of true Christians there. The three at once set out. At their religious meetings in Würtemberg Fontaines was always dressed in black, Madame de Krüdener in blue, and Marie in grey. Besides prophesying the approaching end of the world they incautiously inveighed against the ungodly sovereign of the country, who had introduced a new liturgy. This led to Marie's imprisonment and the banishment of the other two. Marie joined Fontaines and Madame de Krüdener in Baden as soon as she was released, and there they again lived in intimate companionship, occupying themselves as before with devotional exercises and prophesying.
Madame de Krüdener, called to Riga by her mother's last illness, held meetings there too, at which she interpreted the Book of Revelation and dispensed the sacrament. At these meetings she was assisted by the pious shoemaker's pious mother, Frau Blau, in her character of prophetess. Towards the close of the year 1811 Madame de Krüdener returned to Karlsruhe. Fontaines had by this time been ordered off, but she continued to work in company with Marie Kummer, who was looked up to as a great prophetess because she had foretold the victory of the white over the black angel, and had announced that the people from the north of whom Jeremiah had written would presently make their appearance. The Russian war established her reputation, and after the news of the conflagration of Moscow came she was regarded as a positively sacred personage.
There is not the slightest doubt that Madame de Krüdener was entirely persuaded of the purity of her motives, and that she acted in all sincerity. She is not merely converted herself; she is possessed by a passion for converting. Again and again the idea of converting the very denizens of hell and the devil himself occurs to her. It was but natural that she had to bear much and painful misunderstanding on the part of those who were unable to believe in the change that had taken place in her. Even her own mother despised her and stopped writing to her. But no misunderstanding cooled her enthusiasm, which made an impression even upon rationalists. One of these, Sonntag, the chief dignitary of the Livonian church, who had carefully observed her behaviour at Riga in 1811, wrote many years afterwards that, though in his official capacity he had been obliged to sever his connection with her, he owed it to her to bear witness that she showed the deepest, purest, most active, most self-forgetful and self-sacrificing sympathy with every suffering and need of humanity.