That which concerned Martin Luther still concerns the members of Christ's Church. We must always and forever stand firm in the Good News that our worth and value (our salvation) is found in the loving actions of Jesus. God has claimed us and accepts us as children. God is grieved when we fail to reflect our identity but God does not take that identity from us.
Every day of our lives, in more ways than we realize, the "old satanic foe" seeks to rob us of our confidence and of our joy. Working tirelessly, these attacks encourage us to begin to trust in our own ability to make things right or to accomplish our ends. But this is not how matters will be settled. They are put to rest when we allow ourselves to let go and to trust and believe in the forgiveness that God has granted us.
It is Reformation Day? A day to observe and to celebrate. This is a day of rejoicing.