In the church only that theology avails which is rooted in the life of the church and is realized in the life of the church. Only the doctrine of the Sacrament is correct and has the power of conviction which is the expression of the sacramental life of the parish. Thus doctrinal statements as such still mean nothing if they are in no way practiced in the life of the church.
Herman Sasse - “The Deconfessionalization of Lutheranism?” - Letters to Lutheran Pastors, Volume II, pg. 69