True Christianity is a four-book summons to inward renewal, calling readers to repentance, new birth, and the imitation and union with Christ. Composed amid post-Reformation polemics, it interweaves Scripture with Augustine, Luther, and German mystics (Tauler, Theologia Germanica), in lucid, homiletic prose. Arndt moves from cleansing the heart to prayer and works of love, balancing confessional fidelity with practical godliness. Johann Arndt (1555-1621), a Lutheran pastor and churchman, wrote from long pastoral experience amid confessional strife and social anxiety. Educated in leading Protestant centers and steeped in patristic and medieval devotion, he judged doctrinal precision barren without regeneration. His ministry among townspeople and the sick shaped this program of sanctification grounded in Christ's indwelling. This classic rewards historians of religion, pastors, and serious seekers alike. Read it slowly, as a companion for prayer and self-examination, and as a window onto currents that later nourished Lutheran Pietism. For those weary of arid dispute, Arndt offers a bracing, consoling, Scripture-saturated theology of lived holiness. Quickie Classics summarizes timeless works with precision, preserving the author's voice and keeping the prose clear, fast, and readable-distilled, never diluted. Enriched Edition extras: Introduction · Synopsis · Historical Context · Brief Analysis · 4 Reflection Q&As · Editorial Footnotes.