From the Word
3 Beloved, being very eager to write to you of our common salvation, I found it necessary to write appealing to you to contend for the faith which was once for all delivered to the saints. 4 For admission has been secretly gained by some who long ago were designated for this condemnation, ungodly persons who pervert the grace of our God into licentiousness and deny our only Master and Lord, Jesus Christ.
Jude 3–4, RSV
The reason I wish to write unto you, says Jude, is that you may continue in the faith which you have heard. There are already preachers at hand which advocate other doctrines than that faith; by these the people are gently and unsuspectingly led astray from the true way. Upon these false teachers the sentence of judgment, he says, has already been pronounced long ago, namely, that they are condemned.
We now understand this quite well, since we have learned that no one can become righteous or be justified (before God) by his own works, but through faith in Christ alone; that he must rely upon the work of Christ as the chief good and only support. Then after faith is present, whatever man does should be done for the benefit of his neighbor. The grace of God, which holds Christ before us, that is offered and given unto us through the gospel with all that he has, these men use only for leading impure lives. They call themselves Christians, praise the gospel, but live in wantonness, in eating and drinking. They boast that they are not in a secular, but in a spiritual state, and on that account claim all good, honor and luxury.
The denying of the Lord God is not with the mouth, for they confess that God is Lord; but they deny Christ in their deeds and works, considering him not as their Lord, but being their own lords unto themselves. For when they preach that fasts, pilgrimages, church institutions (ceremonies), chastity (celibacy), obedience (to the rules of ecclesiastical orders) poverty and the like are the way to salvation, they lead people astray. They say nothing about Christ, as though he were not needed and his work of redemption of no value. Thus they deny Christ, who has bought them with his own blood. They know not that our salvation is founded upon faith and love. They are offended when we reject their works and preach that Christ alone must help us with his works.
Luther, Martin, and John Sander. Devotional Readings from Luther’s Works for Every Day of the Year. Augustana Book Concern, 1915, pp. 207–08.