Galatians 1:6 ASV

So as I was beginning to read Galatians, this verse really caught me off guard. I've gotten so used to reading Paul's letters where he starts like this 'I am so thankful for you because...' or 'I am so encouraged by you because...' But this starts so differently. This really caught my attention because clearly Paul is going to be addressing something so important in this epistle in order to start it with something so urgent. It's as if he's cutting right to the chase and saying, 'okay look, something is really wrong here.' That kind of honesty and urgency just makes me want to read it and learn something from it that much more.