Mystery of the Church

Focusing on ecclesiology, this book explores the fundamental aspects of the Church, beginning with its essential nature and institutional structure. It highlights the four key marks of the Church: unity, holiness, catholicity—particularly in relation to Eastern Christendom—and apostolicity, including the significance of the Petrine Office. Additionally, it examines the Church's role as an instrument of salvation, its interactions with the State and science, and ultimately its mission in guiding believers toward the Kingdom of God.