Do I need to mention that Paul does not try to hide his frustration with the Galatians?

To our ears, his language--"foolish" and "Who has bewitched you?" sounds offensive
- later on he will say, if they’ve truly taken this wrong path,
“You are severed from Christ . . . you have fallen away from grace” (Gal. 5:4)
• he doesn’t mince words, because he’s terrified for their sake
◦ he wants to make the strongest possible impression on them
• and this is just the beginning
- we’re going to spend some time in verse 1
• first, because the truth in it is so rich and enlightening
• second, because here Paul constructs a foundation for everything else