This document discusses the use of models in ecclesiology. It describes how the church has been modeled using images and symbols from scripture like the body of Christ, bride of Christ, flock, and more. It also describes how the church has been modeled institutionally with teaching, sanctifying, and governing functions. While institutional models provided structure, they risked legalism and clericalism. Overall, multiple complementary models are needed to understand the church's mystery since no single model can adequately capture its richness.