Greetings everyone
We will finish up chapter 4 today, as Paul concludes his Abrahamic argument for The Promise and Grace, and against the Law. Here is my translation of verses 28-31:
28 But you, brothers and sisters, just like Isaac, are children of the promise. 29 But, just as it was then, the one born of the flesh persecuted the one born of the Spirit. That is how it is now, too. 30 What does it say in the Scriptures? “Drive out the slave and her son, because the son of the slave will not inherit alongside the son born to freedom.” 31 So, brothers and sisters, we are not children of slavery, but children of freedom.
He concludes his argument regarding freedom in Christ, sandwiching his conclusion between two statements that they were ‘children of the Promise”, in both verses 28 and 31. In verse 28, we are compared to Isaac. Like him, we are children of the Promise. We are not born into the slavery of the Law. This is the message Paul has been presenting to the Galatians. We, followers of Jesus, are of the Promise, and not the Law.
Paul, then, makes a comparison, without naming either one, between the Judaizing teachers and Ishmael. In Genesis 21, the teenaged Ishamel mocks the infant Isaac, and ultimately is cast out, along with his mother, for it. The Judaizing teachers are Ishmael in the comparison, persecuting true disciples. According to Paul, Ishmael and the Judaizing teachers, and their brand of Christianity are those born of the flesh, while Isaac and true disciples of Jesus are those born of the Spirit.
Back in Genesis, Sarah is very direct to Abraham, as she says in Genesis 21:10 (NIV), “Get rid of that slave woman and her son, for that woman’s son will never share in the inheritance with my son Isaac.” God backs Sarah up on this. Isaac, not Ishamel, was the child of the Promise. The implication from Paul here is, “Get rid of these teachers, and their false gospel. They do not share in the Promise with you.”
Paul wraps up this the discussion of Abraham, Sarah, Hagar, Ishamael and Isaac with a reminder of which side of this argument they belonged on. They were children of freedom, not slavery. They needed to live like it, and not spend their lives bound up by the Law. Likewise, we are children of the Promise, and we are not destined to be bound up by legalistic righteousness. The plan for us is to be free in Christ,