Therefore, we should value good works and remember doing them is still necessary. But we should value God's Word and His promises even more highly. We will live in God's presence because we believe in what He says, not because we do good works that make us holy. We have to make a clear distinction between our good works and our faith in God's Word. Believing in God's Word defeats the devil and makes us holy children of God.
Martin Luther, "Faith Alone," February 10