Everything in the Christian Church is ordered toward this goal...

We further believe that in this Christian Church, we have forgiveness of sin, which is wrought through the holy Sacraments and Absolution and through all kinds of comforting promises from the entire Gospel.  Therefore, whatever ought to be preached about the Sacraments belongs here.  In short, the whole Gospel and all the offices of Christianity belong here, which also must be preached and taught without ceasing.  God's grace is secured through Christ, and sanctification is wrought by the Holy Spirit through God's Word in the unity of the Christian Church.  Yet because of our flesh, which we bear about with us, we are never without sin.

Everything, therefore, in the Christian Church is ordered toward this goal: we shall daily receive in the Church the forgiveness of sin through the Word and the signs, to comfort and encourage our consciences as long as we live here.  So even though we have sins, the grace of the Holy Spirit does not allow them to harm us, for we are in the Christian Church, where there is nothing but continuous, uninterrupted forgiveness of sins.  This is because God forgives us and because we forgive, bear with, and help one another.
~BOC, LC, II, 54-55