Matthew S. Harmon traces the argument of Paul's most polemical letter. In Galatians Paul defends his own authority and attacks his opponents' reasoning, and in both cases the decisive factor is the same: the gospel.

History and Scripture must be interpreted in the light of Christ's arrival, Harmon argues - the new creation has broken in, and nothing is left unaltered. He works through the letter's theological depth, including its account of sin and exile and its apocalyptic frame, and then gathers the biblical theology in the EBTC manner.