One New Man
The Bible tells us that the only way to be reconciled with the One True God of all creation is by God's grace alone, faith alone which He imparts by hearing the Word of God, and in Jesus Christ alone. There is only one Mediator between God and humans and that is the Messiah Jesus (Yeshua in Hebrew in the original text - Read more.). Another term for this is being 'born again' by the power of God's Holy Spirit which begins to reside and work within the person's innermost being (spirit, mind, will and emotions) and through you to lead a purposeful life which glorifies God.
When this happens the person is no longer distinguished as a Jew or Gentile non-Jew, but a 'new creation.' There is neither Jew nor Gentile, neither slave nor free, nor is there male and female, for you are all one in Christ Jesus (Galatians 3:28-29 ).
The recipients of this saving faith are spiritually reconciled with the Creator of heaven and earth (universe) as were their patriarchs and heirs of God's promises Abraham, Isaac, and Jacob.
God is a Spirit, therefore, He chose to manifest Himself to the world through the Bible (His Word) and through the person of Jesus Christ. His born again children are not to live on bread alone, but to grow into the men and women of God that He created them to be by consuming, believing, understanding, maturing, and by being doers of the Word. This process is called sanctification. Sanctification makes disciples who then go on to share the Good News - The Gospel, and making other disciples, who will go onto to repeat this supernatural life-cycle fulfilling the Great Commission - Making Disciples - of all nations (Matthew 28:16-20 disciples - born-again believers in the Lord Jesus).
Some Relevant Bible Verses...
John 3:1-21 English Standard Version