True Christianity / A Treatise on Sincere Repentence, True Faith, the Holy Walk of the True Christian, Etc.
True Christianity is an incredibly influential book that sparked pietism and has undergone hundreds of translations over the past several centuries. Often compared to Martin Luther, Johann Arndt was a reformer intent on calling out the problems in the Church and its people. This intense book completely supports the idea that Christians should always live out what they believe. True Christianity is a must read for any Christian—especially those interested in reformed theology.