Since the apostolic times, the church has produced a dizzying variety of reflections on itself and expressed itself in different terms: Gospel narratives and apostolic epistles, poems and treatises, canons and laws, chronicles and conciliar decrees. It developed multiple theories and languages to speak about itself. This striking diversity of what we have called meta-ecclesiology corresponds to the richness of the historical forms of church life and to the inexhaustible depth of its self-consciousness. It demonstrates that the church is diverse in its very essence. Paradoxically, however, the church has not always apprehended its innate diversity and comprehensiveness. Its members often ignored, and sometimes still ignore, the richness and variety of what the church actually is; they are inclined to reduce it to a single constant or to a single theory. That the church is a constant is true, but only partially true. The purpose of this book was to demonstrate that the nature and self-awareness of the church should be perceived not as a still picture, but as a dynamic reality. A still picture of the church, when dogmatized, induces an insensitivity to the plurality of the world and an inability to appreciate its richness. The only end of this road is the ghettoization of the church. This is why it is crucial for the church to be aware of the dynamism of its own self-awareness—the members of the church then become more aware of the plurality and dynamism of the world, and as result, the church and its members can give more to the world. Recognition and appreciation of its own changing nature, therefore, is a key to a successful interaction of the church with contemporary life— the task that all ecclesiologies in all times have struggled and continue to struggle to accomplish.