The certainty of faith is utter assurance because it depends upon nothing of your own. It is entirely trusting that God is a propitious, pardoning God—the God who justifies sinners by forgiving them.
Sinners get faith as a gift when Christ takes their captivity captive.

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Luther understood when the Word of God came it did not offer sinners a choice.
Christ has taken our failures and defeats and exchanges that yoke for his own.
Even if not a turning point, 1518 is a point of no return for Luther.
The Son of God is still God the Son in the Incarnation.
The way to salvation does not consist in works invented by men, but that which leads to God is believing and trusting in Him.
Martha’s pain is not met by a to-do list. Jesus’ reply is not that she should try harder or change her behavior
We must be careful in how we use Bible verses to establish Scriptural truth both to others and to ourselves.
Bulls, lions, dogs. Why all these metaphors from the animal kingdom to describe humanity as it encircles the crucified Savior? Because the man on the cross, God incarnate, is there for all creation, not just humanity.
God and Jeremiah may have been looking at the same person, but they were seeing very different things.
Grace does not emancipate us from any requirement of obedience. Rather, grace allows Jesus to be obedient on our behalf that the righteous demands of the law can be fulfilled.
There are plenty of reasons why you do not already do whatever you want out of fear of the law, and you will find these reasons persist and remain long after the gospel has its way with you.
God has in fact executed his plans for his people, plans of peace (probably a better translation than welfare), a future, and a hope in Jesus Christ.