In the first half of this chapter, Paul scolded the GalatiansYou know how sometimes, as a parent,- when you're very worried about your child–maybe they did not arrive home on time• when they finally show up, your worry turns to anger◦ if ever our lectures were rougher than they needed to be,◦ it was because we had agonized over their safety• I think that's a little piece of what is happening here◦ Paul has called the Galatians "foolish" and asked "Who has bewitched you?"◦ that is because they had him worried about the stability of their faith- it is often the people who are most concerned with pleasing God,• that are misled by false preachers and teachers◦ they desire so much to be absolutely right with God that they fall victim to someone who seems knowledgeable• anyway, Paul' agitation rises to the surface in these short, clipped statements that barely say enough- here in verse 15, he presents Abraham as an example of being true to a promise