In this verse, Paul introduces the concept of a 'Jerusalem that is above,' which serves as a metaphor for a spiritual realm of freedom. This heavenly Jerusalem stands in contrast to the earthly Jerusalem, which at the time was associated with the old covenant and the law. By referring to this heavenly city as 'our mother,' Paul emphasizes the nurturing and life-giving nature of this spiritual reality. It signifies a community of believers who are not bound by the constraints of the law but are liberated through faith in Jesus Christ.
This imagery of a mother suggests a deep, caring relationship, where believers are nurtured and sustained by God's grace. The heavenly Jerusalem represents a spiritual home where believers find their true identity and purpose. It serves as a reminder that their citizenship is in heaven, and their lives should reflect the freedom and joy that comes from being children of God. This message encourages believers to embrace their spiritual heritage and live out their faith with confidence and hope, knowing they are part of a divine family that transcends earthly limitations.