The first Adam bequeathed a condemnation to death to all his offspring. Did Adam become the forefather of the man Jesus Christ? No, Jesus did not have a human father but was born from a virgin made pregnant with his life-force that God transferred from the spirit realm. So the sinner Adam did not become a forefather of that earthly Son of God. The second Adam, however, has become a life-giving spirit. In this capacity he can fulfill Isaiah's prophecy and become the "Eternal Father" to the first Adam's offspring, whom he repurchases and adopts for the purpose of bestowing perfect human life on a paradise earth.
19 In such a way the heavenly Father of Jesus Christ will become the heavenly Grandfather of the restored human family. For this reason the human family will enter into a new relationship with the Creator of heaven and earth. Never was there the least possibility that Jehovah would fail in his original purpose. Thus Jehovah will have foiled the vicious, ungodly scheme of Satan the Devil. All the repurchased human family will be brought to the knowledge of this fact. What a wonderful day it will be when Jesus Christ takes over the fatherhood of the human family in order to rear mankind in Paradise restored to earth!