We know that we must also teach good works, but they must be taught in their proper turn, when the discussion is concerning works and not the article of justification.
Here the question arises by what means are we justified? We answer with Paul, “By faith only in Christ are we pronounced righteous, and not by works.” Not that we reject good works. Far from it. But we will not allow ourselves to be removed from the anchorage of our salvation.
The Law is a good thing. But when the discussion is about justification, then is no time to drag in the Law. When we discuss justification we ought to speak of Christ and the benefits He has brought us.
Christ is no sheriff. He is “the Lamb of God, which taketh away the sin of the world.” (John 1:29.)
Martin Luther, Comments on Galatians 2:16.