Romans 8:16

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

There are two witnesses, then, and in the mouth of these two witnesses the whole truth about our adoption shall be established. Our own spirit - so changed as to be reconciled to God, and led in ways which once it never trod, - our own spirit bears witness that we are the sons of God; and then God’s own Spirit bears witness, too, and so we become doubly sure.