Let's start with a reading of Galatians 1:11-12:
For I would have you know, brothers, that the gospel that was preached by me is not man's gospel. For I did not receive it from any man, nor was I taught it, but I received it through a revelation of Jesus Christ.
Let's go back to verse 1 to check out a similarity with our passage today. Verse 1 says, "Paul, an apostle - not from men nor through man, but through Jesus Christ and God the Father, who raised him from the dead." Notice the similarity between that and verse 11: "For I would have you know, brothers, that the gospel that was preached by me is not man's gospel." This is really important. That's why Paul states it two different ways. It was the Risen Christ himself who commissioned Paul as an apostle. Jesus Christ, and Christ alone, revealed the gospel to him.
It's important to know that Paul is an apostle called by Christ.
The first thing we ask is, why did Paul feel a need to defend his apostleship? The answer is in verse 7: "There are some who trouble you
and want to distort the gospel of Christ." Another translation of "trouble" is "pervert." Paul is talking about turning something into its opposite. By adding law to the gospel of Christ, the false teachers were effectively destroying grace, turning the message of God's undeserved favor toward sinners into a message of earned and deserved favor. Here's a truth you might want to write down: