Paul’s response to the question, “Shall we go on sinning that grace may increase?” is, 2. By no means! We who died to sin, how can we any longer live in it? The very suggestion that the end justifies the means, that grace may be produced by living in sin, is so thoroughly obnoxious to Paul that he answers it by making use of one of his characteristic, blunt rejection formulas, “By no means.” See on 3:4, p. 111. For a Christian, continuing to live in sin is not only impermissible, it is impossible!