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.
Here he published his two chief works, Pia desideria (1675) and Allgemeine Gottesgelehrtheit (1680), and began that form of pastoral work which resulted in the movement called Pietism.
It was partly on Augustinian lines, partly on the lines of what the Germans call Pietism.
Two hundred years later, a movement called pietism, with its emphasis on holiness and prayer, emerged from a rather dry Lutheranism.
Its "sugary optimism, unctuous phraseology and pulpit logic" appealed, however, to the reviving pietism of the age succeeding the Revolution, and these qualities, as well as his eloquence as a preacher, early brought Ancillon into notice at court.