The church is a paradox. On the one hand, it is suceptible to error, prone to get things wrong, and full of people whose lives are messy. On the other hand, it is the church of the living God and the pillar and buttress of truth. These two realities may seem to be at odds with each other. But the Reformation helps us understand this paradox. And perhaps just as importantly, this paradox helps us understand the Reformation.