The Spirit himself bears witness with our spirit, that we are the children of God:
All Commentaries on Romans 8:16 Go To Romans 8
Cyprian of Carthage
AD 258
Moreover, the blessed Apostle Paul exhorts and teaches, saying, "We are God's children; but if children, then heirs of God, and joint-heirs with Christ; if so be that we suffer with Him, that we may also be glorified together.".
"We are "says he, "the sons of God: but if sons, then heirs; heirs of God, and joint-heirs with Christ; if so be that we suffer with Him, that we may also be glorified together.".
And again: "We are children of God: but if children, then heirs; heirs indeed of God, but joint-heirs with Christ, if we suffer together, that we may also be glorified together.".
Of this same thing to the Romans: "We are the sons of God: but if sons and heirs of God, we are also joint-heirs with Christ; if we suffer together, that we may also be magnified together."