He wrote a large work on the Christian doctrine of justification and atonement, Die Christliche Lehre von der Rechtfertigung and Versohnung, published during the years 1870-74, and in 1880-86 a history of pietism (Die Geschichte des Pietismus).
Marguerite herself, however, was protected by her brother, and her personal inclinations seem to have been rather towards a mystical pietism than towards dogmatic Protestant sentiments.
How millennarianism nevertheless found its way, with the help of apocalyptic mysticism and Anabaptist influences into the churches of the Reformation, chiefly among the Reformed sects, but afterwards also in the Lutheran Church, how it became incorporated with Pietism, how in more recent times an exceedingly mild type of "academic" chiliasm has been developed from a belief in the verbal inspiration of the Bible, how finally new sects are still springing up here and there with apocalyptic and chiliastic expectations - these are matters which cannot be fully entered upon here.
Baumgarten (1706-1757), the link between the old Pietism and J.
Spener, "the father of pietism," he became tutor in Quedlinburg.