When someone says they are married to so and so there is never a scientific proof of it but it is true for them nonetheless and they live by that truth. A marriage ring and certificate are not scientific proof. God said of the Son of Man that God Himself regards Him as Son. Jesus is that Son of Man made flesh. God said so at Jesus's baptism and the Spirit of God says so by the things He reveals within believers. God does not need to prove it scientifically but would do so if He wished but He hides it from the 'wise' and reveals it to the child. Ancients knew such revelations and though science was regarded highly they regarded these revelations highly too. Modern wisdom is so much of it folly in God's eyes.
