Pietism, the major Protestant renewal movement in the 17th and 18th centuries, sought to bring the head into the heart, to recover an experiential-expressive faith, to continue Luther’s reform of doctrine with reform of Christian living, to complete justification by sanctification. Hence Pietism understood itself as “the Second Reformation,” as the “church always reforming.”
The leading figures of Lutheran Pietism understood themselves as true followers of Luther. Johann Arndt’s True Christianity (1605–1610), one of the most influential writings of early modern Protestantism, appealed to the young Luther’s esteem for late medieval mysticism, and emphasized Christian religious experience. Philipp Jakob Spener, “the Father of Pietism,” wrote the programmatic tract for Lutheran Pietism, Pious Desires (1675), as a “foreword” to a collection of Arndt’s sermons. Spener, who had extensive knowledge of Luther’s writings, called for improved pastoral formation and increased lay participation in the church (priesthood of all believers) through gatherings for prayer and Bible study (collegia pietatis). He supported his program by appeal to Luther’s emphasis upon living, active faith in Luther’s “Preface to Romans” and “Preface to the German Mass.” Unlike “radical Pietists,” who despairing of renewal separated from the established church, Spener was convinced that God would provide “better times” for the church as it was renewed from within (the ecclesiola in ecclesia).
Spener’s call for spiritual and ethical renewal, praxis pietatis, was sharpened by his follower, August Hermann Francke. Francke’s struggles with doubts of God led to his conversion experience in 1687, his so-called Busskampf, experienced as a rebirth. From this Francke introduced into Pietism the concern for a once-for-all datable conversion or rebirth that would initiate a life of progressive sanctification. Francke’s new emphasis upon progressive sanctification toward perfection departed significantly from Luther’s dialectical theology, which understood the Christian as sinner and righteous as the same time (simul iustus et peccator). On the other hand, Francke continued Luther’s emphasis upon the Bible and strove to make the Bible as accessible as possible to the laity. A professor of biblical languages at the new University of Halle, Francke corrected the Luther translation through his own highly skilled historical-philological exegesis and in the process influenced succeeding generations of biblical scholars.
A third-generation Pietist leader, Nicholas Ludwig von Zinzendorf, one of Francke’s students at the University of Halle, created a vibrant Pietist community on his estate when he welcomed Protestant refugees from Moravia in 1722. Although not a trained theologian like his predecessors Spener and Francke, Zinzendorf followed the Lutheran emphasis upon atonement as the basis for justification before God. He supplemented Luther’s theology of the cross with his experiential “heart-religion” (Herzensreligion); Christians must have Christ in their hearts, not just their heads.
Lutheran Pietists used Luther selectively to advance their understanding of the practice of piety.
The missional church structure and the priesthood of all believers (Ephesians 4:7�16) in the light of the inward and outward function of the church
