Man through Adam's fall had a nature that could do nothing but sin, but through the work of Christ on the cross, God will restore all that was lost through the fall. The individual receives the blessing through repentance and the obedience of faith. Having repented, the soul is now in dependence on the Lord and His work on the cross.
In Luke 3 God traces man's lost condition right back to its source (Gen. 3) where the mischief began in the garden. Then He shows us how the problem is met and resolved in the person and work of the Son of man. Now God is free to bless all who repent.
The kingdom of God is a vast moral kingdom with Christ, the Son of man, at its head. Righteousness, peace and joy in the Holy Spirit are its attributes. When the nation of Israel refused the kingdom of God and its king, it was offered to the Gentiles who received it by faith.
Jesus said to Nicodemus, "Verily, verily, I say unto thee, Except a man be born of water [the Word] and of the Spirit, he cannot enter into the kingdom of God." John 3:5. Flesh and blood cannot enter it (1 Cor. 15:20), for the works of the flesh disqualify one to enter.
The forsaking all of our former religious life shows a new birth and a new creation. The work of the Holy Spirit in a soul is like the woman sweeping the house, my inner being, and discovering the lost silver coin. She continued until she found it and then rejoiced with her friends (Luke 15:8-10).