Back in the discussion of Galatians 1 we noted that Paul essentially skips all of the normal preamble of ancient letters and gets right to his main point. His thesis is summarized in verses 6–9, but particularly his amazement they have so quickly abandoned what verses 8–9 underscore is an unchangeable gospel. Then beginning in verse 10 Paul introduces principles and arguments that in Greek are clearly marked as support for his opening thesis. That chain of support in turn is supported