Galatians 4:21 to 31 is about Abraham’s two sons, Ishmael and Isaac. Ishmael was born according to the flesh but Isaac was born through God’s promise (verse 23). This part of Galatians is not merely historical for Paul says in verse 24 that these things are allegorical. In verse 25 he explains that Hagar symbolizes Mt. Sinai in Arabia and corresponds to the physical Jerusalem. In verse 26 he does not continue with the side of the allegory for Sarah but rather says, “But the Jerusalem above is free, which is our mother.” The Jerusalem above is not physical and not earthly. It is the heavenly Jerusalem in Hebrews 12:22.
The heavenly Jerusalem, the Jerusalem above, is the mother of all the New Testament believers. This Jerusalem is alive! This Jerusalem has brought forth many children! This Jerusalem is one with the Spirit of whom we are born in our human spirit (John 3:6). This Jerusalem is spiritual, not physical. This Jerusalem exists now, throughout the entire New Testament age, since she is the mother of all the New Testament believers. The issue of this heavenly Jerusalem above will be eternal New Jerusalem.
Bible verses quoted in these posts are from The Holy Bible, Recovery Version, published and copyrighted by Living Stream Ministry, Anaheim CA, 2003. The New Testament of this Bible, with its outlines, footnotes, and cross-references, may be viewed at online.recoveryversion.org; this too is copyrighted by Living Stream Ministry, Anaheim CA.