Cardinal Newman once stated that to be deep in church history is to cease to be Protestant. These essays argue that, on the contrary, to be Protestant is simply to be a principled catholic. In one sense, the Protestant tradition just is the catholic tradition shorn of excess and reduced to truly "universal" doctrine and principle. We embrace God's calling to maturity by learning to be active participants in the universal church as it grows into fuller understanding of God's revelation. Openness to reform is not silly submission to the ethos of each age, but is rather the insistence that all of our understanding must submit (in the classic formula of Luther) to the bar of the Scripture and plain reason, which stands above and judges the church in each era. The whole Word stands in judgment over our fractured communities and fragmented understanding.However, it is the whole church which participates in this motion toward maturity, and which must commit to growing together rather than growing apart. This includes both a deference to our learned forefathers and a willingness to be confronted with new insight into God's revelation. Taken together, this collection of essays constitute an invitation into this great project, which has its end in the glory of the Lord Jesus, and the freedom of His chosen saints.