practice these two things is not benefited, no matter whether he kills himself fasting or becomes a martyr, permits himself to be burned at the stake, and performs all miracles, as St. Paul teaches in 1 Corinthians 13[:1–3]. [The Second Matter] The second mystery or hidden teaching is that in the church nothing other than the gospel shall be preached. Now the gospel teaches only the two previous things, Christ and his example, two kinds of good works: one kind belonging to Christ, by means of which