On the Unity of the Catholic Church

Cyprian's work, On the Unity of the Catholic Church, emphasizes the importance of the church's unity and the bishop of Rome's central role as the source of the episcopacy. The text argues that schism and rebellion against the priesthood are grave sins. Cyprian believed that the church, as the "pure Bride of Christ," must maintain its integrity, and that unity is expressed through the consensus of bishops.1

The concept of the church in Christian doctrine refers to the entire community of believers. Historically, the church has faced divisions, such as the East-West Schism in 1054 and the Protestant Reformation. The Nicene Creed outlines four marks of the church: one, holy, catholic, and apostolic. Ecumenism is a movement that seeks to renew and unite Christians and churches of different traditions, aiming to bring about the unity of the human family.23