Martin Luther's Preface to Commentary on Galatians, Tim Keller Paraphrase

 So learn to “speak the Gospel” to one’s heart. For example, when the law creeps into your conscience, learn to be a cunning logician—learn to use arguments of the Gospel against it. Say:

O law! You would climb up into the kingdom of my conscience, and there reign and condemn me for sin, and would take from me the joy of my heart which I have by faith in Christ, and drive me to desperation, that I might be without hope. You have overstepped your bounds. Know your place! You are a guide for my behavior, but you are not Savior and Lord of my heart. For I am baptized, and through the Gospel am called to receive righteousness and eternal life...So trouble me not! For I will not allow you, so intolerable a tyrant and tormentor, to reign in my heart and conscience—for they are the seat and temple of Christ the Son of God, who is the king of righteousness and peace, and my most sweet savior and mediator. He shall keep my conscience joyful and quiet in the sound and pure doctrine of the Gospel, through the knowledge of this passive and heavenly righteousness. 

When we are assured of this righteousness, we not only cheerfully work well in our vocations, but we submit to all manner of burdens and dangers in this present life, because we know that this is the will of God, and that this obedience pleases him. This then is the argument of this Epistle, which Paul expounds against the false teachers who had darkened the Galatians’ understanding of this righteousness by faith.

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