Romans 8:16

Romans 8:16. The Spirit itself beareth witness with our spirit, that we are the children of God :

What better testimony can we have than that of these two witnesses, first of our own spirit, and then of the Holy Spirit himself, "that we are the children of God"? Note that this is not spoken concerning everybody. The doctrine of the universal Fatherhood of God in a doctrine of the flesh, and not of the Spirit; it is not taught anywhere in God’s Word. This is a Fatherhood which relates only to those who are spiritual; we are born into it by the new birth, and brought into it by an act of grace in adoption. "Beloved, now are we the sons of God;" this is a special privilege that belongs only to those who are spiritual.