When Jesus spoke to Nicodemus in John 3, He was not introducing a new religious ceremony but revealing a spiritual reality that every person must experience if they are to enter the kingdom of God.
Jesus said "Except a man be born again, he cannot see the kingdom of God." John 3:3
Nicodemus immediately thought in physical terms, asking how a grown man could enter his mother's womb a second time. Jesus gently corrected him by explaining that He was speaking of a birth that is spiritual, not physical.
Continued: "Except a man be born of water and of the Spirit, he cannot enter into the kingdom of God. That which is born of the flesh is flesh; and that which is born of the Spirit is spirit." John 3:5-6
The contrast throughout the passage is between natural birth and spiritual birth. We are all born into this world physically, but no one enters God's kingdom apart from the work of the Holy Spirit. The new birth is not something we accomplish ourselves. It is the work of God within us. This truth is repeated throughout the New Testament.
Paul writes: "Not by works of righteousness which we have done, but according to his mercy he saved us, by the washing of regeneration, and renewing of the Holy Ghost." Titus 3:5
Peter says: "Being born again, not of corruptible seed, but of incorruptible, by the word of God." 1 Peter 1:23
The new birth is God's gracious act of giving spiritual life to those who place their faith in Jesus Christ. It is not simply turning over a new leaf, joining a church, or becoming more religious. It is receiving a new heart and a new life.
So how can someone know they have been born again? The Bible points to both faith and fruit.
A person who has been born again believes that Jesus Christ is the Son of God and trusts Him for salvation. They have turned to Him in repentance, not trusting in their own goodness or religious works. Along with this faith comes a changed heart. While believers are not instantly perfected, there is a growing desire to obey God, love Him, love fellow believers, and turn away from sin. The Holy Spirit begins producing His fruit within them Galatians 5:22–23. As Paul says:
"If any man be in Christ, he is a new creature: old things are passed away; behold, all things are become new." 2 Corinthians 5:17
This transformation is not the basis of salvation but the evidence of it.
What, then, does Jesus mean by being born "of water and of the Spirit"?
Faithful Christians have understood these words in different ways. Some understand "water" to refer to Christian baptism. Others understand it as referring to physical birth. Another view, which many find compelling, connects Jesus' words with God's promise in Ezekiel:
"Then will I sprinkle clean water upon you, and ye shall be clean... A new heart also will I give you, and a new spirit will I put within you... and I will put my Spirit within you." Ezekiel 36:25-27
This prophecy brings together cleansing with water and the gift of God's Spirit. Since Jesus expected Nicodemus, "the teacher of Israel," to understand what He was saying John 3:10, it seems likely that He was pointing him back to these Old Testament promises of inward cleansing and spiritual renewal.
Immediately after this conversation, John's Gospel tells us that Jesus and his disciples went into the countryside, where people were being baptized John 3:22. That naturally raises the question of whether baptism itself is the new birth.
The New Testament presents baptism as deeply important. Jesus commanded his followers to be baptized. The apostles baptized those who believed. Baptism is the public confession that a believer has identified with Christ in his death, burial, and resurrection Romans 6:3-4
It is an act of obedience that should never be neglected or treated lightly.
At the same time, John's Gospel consistently emphasizes that eternal life is received through believing in Jesus Christ.
Only a few verses after speaking with Nicodemus, Jesus says: "For God so loved the world, that he gave his only begotten Son, that whosoever believeth in him should not perish, but have everlasting life." John 3:16
Continued: "He that believeth on him is not condemned." John 3:18 And again, "He that believeth on the Son hath everlasting life." John 3:36. Throughout John's Gospel, believing in Christ is presented as the means by which we receive eternal life. Baptism follows as the obedient response of those who have believed.
The book of Acts reflects this same pattern. People heard the gospel, believed in Jesus Christ, and were then baptized as a public declaration of their faith. Baptism was never presented as an optional extra, but neither was it separated from faith in Christ.
The new birth, therefore, is far more than an outward act. It is the miracle of God bringing a spiritually dead sinner to life through the work of the Holy Spirit. Baptism beautifully testifies to that inward reality, but it is the Holy Spirit who gives life.
Jesus compared the Spirit's work to the wind: "The wind bloweth where it listeth... so is every one that is born of the Spirit." John 3:8
We cannot control the wind, but we see its effects. In the same way, we cannot manufacture the new birth, but where the Holy Spirit has given new life, its evidence will become visible in a person's faith, love, obedience, and growing likeness to Christ.
That is why Jesus did not tell Nicodemus merely to become more religious. He told him something far more profound:
"Ye must be born again." John 3:7
That remains the heart of the gospel today.
