Over the course of history distinct ecclesial communities emerged within Christianity emphasizing different values and varied aspects of the one faith. They meet for conversations and mutually recognize one another as separate corporative entities with their own identities and responsibilities. Their members also constitute a single temple inhabited by one Spirit, incorporated by baptism into one Lord and with one God at work in them, so that they are in some sense one community with a single identity. A theologian may obtain new insight into this mystery through the Dialogical Self Theory, which construes the human self as constituted by a multitude of I-positions with different, often contradictory, narrative voices, each telling its own story. It allows for a positive interpretation of the organizational division of the one Catholic Church as a process of articulating the ecclesial I-positions. This enables the Church to lead an internal dialogue in which it can be transformed and discover the fullness of the meanings entrusted to it. The paper presents DST intended to describe human individuals and its possible application to ecclesial reality.