"True Christianity: A Treatise on Sincere Repentance, True Faith, the Holy Life of a True Christian, and More" - this book is an important work by the author Johann Arndt, who devoted his life to the study and dissemination of Christian spirituality. In his book, he reveals the importance of sincere repentance, faith and a righteous life for a true Christian. Arndt explores these topics in depth, providing the reader with insights and advice on how to become a better version of themselves in faith. "True Christianity" is not only a book, but also a spiritual guide that helps to understand the depths of faith and helps every seeker to find his inner path to God.