“My friends, the Antinomians preach exceedingly well —and I cannot but believe that they do so with great earnestness— concerning the mercy of Christ, forgiveness of sin, and other contents of the article of redemption.
But they flee from this inference as from the devil, that they must tell the people about the Third Article, of sanctification, that is, of the new life in Christ.
For they hold that we must not terrify people and make them sorrowful, but must always preach to them the comfort of grace in Christ and the forgiveness of sin. They tell us to avoid, for God’s sake, such statements as these:
‘Listen, you want to be a Christian while you are an adulterer, a fornicator, a swill-belly, full of pride, avarice, usurious practices, envy, revenge, malice, etc., and mean to continue in these sins?’ On the contrary, they tell us that this is the proper way to speak: ‘Listen, you are an adulterer, fornicator, miser, or addicted to some other sin. Now, if you will only believe, you are saved and need not dread the Law, for Christ has fulfilled all.’
Tell me, pray-thee, does not this amount to conceding the premise and denying the conclusion? Verily, it amounts to this, that Christ is taken away and made worthless in the same breath with which He is most highly extolled. It means to say yes and no in the same matter. For a Christ who died for sinners who, after receiving forgiveness, will not quit their sin nor lead a new life, is worthless and does not exist.
According to the logic of Nestorius and Eutyches these people, in masterful fashion, preach a Christ who is, and is not, the Redeemer. They are excellent preachers of the Easter truth, but miserable preachers of the truth of Pentecost. For there is nothing in their preaching concerning sanctification of the Holy Ghost and about being quickened into a new life.
They preach only about the redemption of Christ. It is proper to extol Christ in our preaching; but Christ is the Christ and has acquired redemption from sin and death for this very purpose that the Holy Spirit should change our Old Adam into a new man, that we are to be dead unto sin and live unto righteousness, as Paul teaches Rom. 6, 2 ff., and that we are to begin this change and increase in this new life here and consummate it hereafter.
For Christ has gained for us not only grace (gratiam), but also the gift (donum) of the Holy Ghost, so that we obtain from Him not only forgiveness of sin, but also the ceasing from sin. Any one, therefore, who does not cease from his sin, but continues in his former evil way must have obtained a different Christ -from the Antinomians. The genuine Christ is not with them, even if they cry with the voice of all angels, Christ! Christ! They will have to go to perdition with their new Christ.”
-Martin Luther, Concerning Councils and Churches St. L. Ed. XVI, 2241 f.