Regeneration is a re-creating and transformation of a person by God, the Holy Spirit ( Rom. 12 : 1; Eph. 4: 23 – 24)
Through this process eternal life from God is imparted to the repentant sinner who turned to Him, and he or she becomes a child of God, and a new person in his or her spirit man. See II Corinthians 5: 17; Galatians 3: 26 – 27; Romans 8: 16 – 17; Colossians 3: 9 – 10; II Peter 1: 4; and I John 5: 11.
Why is Regeneration Necessary? It is necessary because every human being is by nature a sinner. “For all have sinned, and come short of the glory of God.” (Romans 3: 23) “Behold I was shapen in iniquity, and in sin did my mother conceive me” (Psalm 51: 5; Jeremiah 17: 9).
The unsaved person is dead spiritually speaking, and therefore needs a new life (Ephesians 2: 1 – 2; 4: 17 – 19)
Death in scripture is referring to physical or spiritual death majorly.
In physical death, separation of the spirit from the body takes place (James 2: 26)
In spiritual death, separation of the sinner from God takes place.
The unsaved soul will eternally be separated from God, the source of true life. The Bible calls this, “the second death” in Revelation 20: 10 – 15.
Someone has defined death as “the cessation of correspondence with environment” (Genesis 2: 17)
The day Adam ate of the forbidden fruit in Eden, he died not physically, but spiritually because his correspondence with God ceased. He was spiritually disconnected from God, the source of true spiritual life.
Adam by that disobedient act exchanged the nature of God in him for the nature of Satan which is the nature of sin and death.
We can further gain insight to this truth, when we read the account of the prodigal son in Luke 15: 21 – 24.
If I may ask, when was the prodigal “dead”?
He was seen as dead while he was in the “far country”, separated from his father or family and having no correspondence with them (I Timothy 5: 6).
Since the unsaved person is spiritually dead in sins, incapable of obeying and pleasing God, his number one need is not money or material wealth, but eternal life from God. His great need is his soul connecting back to God, the source of true life (Romans 8: 7 – 8)
The giving or communication of this life to the one who has realized his or her need of true life, and turned to God in repentance, and accepts Jesus by faith as Lord and Saviour is what the Bible calls “regeneration”, the “new birth”, or “born of the Spirit”.
This fundamental truth about the new birth is also clearly set out in John 1: 12 – 13: “But as many as received him to them gave He power to become the sons of God, even to them that believe on his name which were born, not of blood, nor of the will of the flesh, nor of the will of man, but of God”
We see from this passage that the new birth is not hereditary – “not of blood”
No one has life in Christ because his or her parents were Christians or that you were born into a religious home.
That you were a founder of a denomination or a great religious movement is immaterial.
Thank God, spiritual or the new birth is not inherited. Every child of Adam needs to be regenerated for himself.