What is the most important conversation you have ever had?
I can think of a few that stand out in my own life. Back in Christmas 2005, I traveled to Boise, Idaho to meet my then-girlfriend’s family — a young woman named Megan Smith. A few months later, we were talking seriously about marriage, and I made a phone call to her father to ask for his blessing. He was surprised enough that he and Megan’s mom flew out so we could have that conversation in person. I remember sitting in a hotel room with Roger Smith while Megan and her mom went shopping. It was an important conversation. I’m glad I passed the interview.
Maybe you have a conversation like that in your own story — one that changed your relationships, your direction, or your life. Maybe it was with a mentor who gave you exactly the right advice at the right time.
But for those of us who follow Christ, there is one category of conversation that rises above all others: the conversation that helped us come to trust in Jesus as our Savior.
The Most Important Question
I cannot think of a more crucially important subject than what happens to a person after they die. Is there a heaven and hell? How does someone enter the Kingdom of God?
When you step back and look at the world’s religions, they really fall into only two categories:
- The religion of works — you are made right with God by doing enough good to outweigh your bad.
- The religion of faith — you are made right with God by the righteousness of another.
Starting in John 3, we encounter one of the most important conversations ever recorded in human history. It has been studied, preached, and wrestled with for centuries. Warren Wiersbe recounts a fascinating anecdote about Benjamin Franklin and the British preacher George Whitefield:
“I find that you grow more and more famous in the learned world,” Whitefield wrote to Franklin. “As you have made such progress in investigating the mysteries of electricity, I now humbly urge you to give diligent heed to the mystery of the new birth. It is a most important and interesting study and, when mastered, will richly repay you for your pains.”
Whitefield was exactly right. And the conversation in John 3 gets to the heart of that mystery.
Two questions form the core of what Jesus and Nicodemus discuss:
- How does a person get into the Kingdom of God?
- How does someone know they are going there?
How Does a Person Get Into the Kingdom of God?
The Context: A Nighttime Visit (John 3:1–2)
There was a man of the Pharisees, named Nicodemus, a ruler of the Jews: The same came to Jesus by night, and said unto him, Rabbi, we know that thou art a teacher come from God: for no man can do these miracles that thou doest, except God be with him. — John 3:1–2
Nicodemus was not just any religious leader. He was a Pharisee — part of a conservative, theologically orthodox Jewish class that held both religious and political authority in Israel. These were men who knew the Scriptures and took them seriously.
He came to Jesus at night, likely to avoid being seen. But notice what he says when he arrives. He calls Jesus “Rabbi” — a term of respect — and then makes what would have been a significant concession from someone in his position: “We know that thou art a teacher come from God.”
The “we” is striking. He’s not just speaking for himself. He seems to be speaking on behalf of his entire circle — the Pharisees. The miracles Jesus was performing were accomplishing exactly what they were meant to: they authenticated His authority.
And yet — as significant as this admission was — it was not enough. It may have felt like a great concession to Nicodemus, but it did not go far enough. God is the authority on how a person enters into relationship with Him, not man. To be a little bit off is to miss heaven entirely.
1. The Necessity of New Birth (v. 3)
Jesus cuts straight to the heart of the matter:
Jesus answered and said unto him, Verily, verily, I say unto thee, Except a man be born again, he cannot see the kingdom of God. — John 3:3
The phrase “born again” is rich in the original Greek. The word translated “again” (ἄνωθεν, anōthen) can also mean “from above.” So Jesus is simultaneously saying: you must be born a second time, and that second birth must come from above — from God Himself.
Jesus frames this truth with “Verily, verily” — a double “amen.” He is doubling down on the certainty of what He is about to say. We might put it this way: “You can take this to the bank.” And what He is banking everything on is this: without a new birth, no one will see the Kingdom of God.
2. The Agency of New Birth (v. 4–6)
Nicodemus responds the way any of us might:
Nicodemus saith unto him, How can a man be born when he is old? can he enter the second time into his mother’s womb, and be born? — John 3:4
He is not being foolish — he is being honest. The idea is physically absurd, and he knows it. So what does Jesus mean?
Jesus answered, Verily, verily, I say unto thee, 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
Jesus is drawing a distinction between two kinds of birth. Being “born of water” refers to physical birth — every person who has ever drawn a breath has been born that way. But physical birth is only the beginning. A person must also be born spiritually, and that second birth is the work of the Holy Spirit.
The parallelism in verse 6 makes it plain: flesh produces flesh, but the Spirit produces spirit. If you have only been born physically, you are alive in body but dead in spirit.
This is confirmed elsewhere in Scripture:
In whom ye also trusted, after that ye heard the word of truth, the gospel of your salvation: in whom also after that ye believed, ye were sealed with that holy Spirit of promise, Which is the earnest of our inheritance until the redemption of the purchased possession, unto the praise of his glory. — Ephesians 1:13–14
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; Which he shed on us abundantly through Jesus Christ our Saviour. — Titus 3:5–6
We are saved by grace through faith. When we hear the Word of God, the Spirit draws us. When we respond in faith — repenting of sin and trusting in Christ — the Holy Spirit regenerates us and seals us until the day we enter into the Kingdom He has prepared.
3. The Visibility of New Birth (v. 7–10)
Jesus then offers an illustration to help Nicodemus understand how this works:
Marvel not that I said unto thee, Ye must be born again. The wind bloweth where it listeth, and thou hearest the sound thereof, but canst not tell whence it cometh, and whither it goeth: so is every one that is born of the Spirit. — John 3:7–8
You cannot see the wind. But you can see what the wind does. You can hear it. You can watch branches bend and leaves shake. The wind’s effects are undeniable, even when the wind itself is invisible.
The same is true of the Spirit. We do not see regeneration happen in real time. We cannot take a photograph and determine from it whether someone is saved. But over time, the evidence of genuine new birth becomes visible — in relationships, in priorities, in stewardship, in the direction of a person’s life. The Spirit of God living within a person affects everything.
This is exactly what James describes:
Even so faith, if it hath not works, is dead, being alone. Yea, a man may say, Thou hast faith, and I have works: shew me thy faith without thy works, and I will shew thee my faith by my works. Thou believest that there is one God; thou doest well: the devils also believe, and tremble. — James 2:17–19
The effect does not make the cause — but it does indicate the cause. Works do not earn salvation. But genuine salvation produces transformation. It is not from the outside in; it is from the inside out.
Nicodemus answered and said unto him, How can these things be? And Jesus answered and said unto him, Art thou a master of Israel, and knowest not these things? — John 3:9–10
There are systems of religion that look impressive from the outside. There are people sincerely trying to do good. But if the Spirit has not moved — if there has been no genuine new birth — there is no eternal transformation. Religion will not get you there. Good works will not get you there. You must be born again.
How Does Someone Know They Are Going There?
The Spirit’s work is the evidence. Romans 8 ties it together beautifully:
For as many as are led by the Spirit of God, they are the sons of God. For ye have not received the spirit of bondage again to fear; but ye have received the Spirit of adoption, whereby we cry, Abba, Father. The Spirit itself beareth witness with our spirit, that we are the children of God: And if children, then heirs; heirs of God, and joint-heirs with Christ; if so be that we suffer with him, that we may be also glorified together. — Romans 8:14–17
The Spirit Himself bears witness with your spirit. The leaves shake. The branches bend. There is evidence of the Spirit of God at work in the life of someone who has been born from above.
A Final Word
If you have only been born physically, you will die in your sins — separated from God. If you have been born physically and spiritually, you will see the Kingdom of God.
If the Spirit is drawing you right now — convincing you of your need, convicting you of your sin — do not harden your heart.
For he is our God; and we are the people of his pasture, and the sheep of his hand. To day if ye will hear his voice, harden not your heart. — Psalm 95:7–8
The most crucial conversation you can ever have is the one where you come face to face with Jesus Christ and the question He puts to every person: Will you be born again?
This post is part of an ongoing series through the Gospel of John — “That Ye May Believe.”



