John 3:9–15
From Heaven to the Cross: The Son of Man Lifted Up

Correct Interpretation of John 3:9–15

After hearing the teaching about the new birth, Nicodemus remains confused. Despite his knowledge as a teacher of Israel, he cannot grasp the spiritual depth of Jesus’ words. In this section, the Lord points out his lack of understanding and faith, affirms His heavenly origin, and anticipates the means by which God will give eternal life: His sacrifice on the cross. The dialogue moves from the revelation of heavenly realities to the foundation of the gospel: eternal life for everyone who believes in the Son of Man who is lifted up.

1. Nicodemus’ lack of understanding

“Nicodemus said to Him, ‘How can these things be?’” (v. 9)

Although he is a religious leader and teacher in Israel, Nicodemus cannot understand Jesus’ teaching about the new birth. His question shows that he is still trying to interpret spiritual realities from a human perspective.

His reaction reflects the human difficulty of understanding the things of the Spirit apart from the work of God (1 Corinthians 2:14). It also shows that religion, knowledge, and training are not sufficient to perceive spiritual truth. True understanding depends on God’s revelation and on the work of Christ (2 Corinthians 3:14-16).

2. The responsibility of a teacher of Israel

“Jesus answered and said to him, ‘Are you the teacher of Israel and do not understand these things?’” (v. 10)

Jesus highlights Nicodemus’ responsibility. He was not an ordinary Jew, but a teacher of Israel—a man devoted to teaching the Law and the Prophets. He was expected to have spiritual discernment, especially since the promises of the new birth had already been announced in Scripture (Ezekiel 36:25-27).

His lack of understanding shows that knowledge of Scripture is not always accompanied by true spiritual comprehension. This verse warns of the danger of knowing the truth intellectually while missing its spiritual meaning.

3. The rejected heavenly testimony

“Truly, truly, I say to you, we speak of what we know and testify of what we have seen, and you do not accept our testimony.” (v. 11)

Jesus affirms the authority of His teaching: He speaks of what He knows and bears witness to what He has seen. His message is not a human opinion, but revelation grounded in direct knowledge of divine realities. Yet His testimony is not received.

The plural (“you”) expands His answer beyond Nicodemus and includes those who, within Israel’s leadership and people, reject God’s revelation. This rejection had already been anticipated: “He came to His own, and those who were His own did not receive Him” (John 1:11).

4. If you do not believe earthly things, how will you believe heavenly things?

“If I told you earthly things and you do not believe, how will you believe if I tell you heavenly things?” (v. 12)

Jesus refers to spiritual realities that are experienced within human life, such as the new birth and the work of the Spirit. If they do not believe these foundational truths, how can they receive deeper revelation about the origin and work of the Son of God?

This verse shows that the problem was not a lack of clarity in Jesus’ teaching, but a lack of faith to receive it. Jesus spoke plainly, but His message was rejected.

5. The Son of Man who came down from heaven

“No one has ascended into heaven, but He who descended from heaven: the Son of Man.” (v. 13)

Jesus affirms His heavenly origin and His unique authority to reveal divine realities. No human being has ascended into heaven to bring back knowledge from God, but the Son of Man has descended from heaven. Therefore, He can speak with authority about heavenly things.

The title “Son of Man” connects to the Messianic figure of Daniel 7:13-14. Jesus is not merely a human teacher, but the One sent from heaven, who lives in intimate communion with the Father and makes Him known (John 1:18). His teaching does not come from the earth, but from God.

6. The announcement of the redeeming sacrifice

“As Moses lifted up the serpent in the wilderness, even so must the Son of Man be lifted up,” (v. 14)

Jesus connects His mission with the episode of Numbers 21:4-9, where God sent serpents as judgment, yet also provided a means of life for those who looked at the lifted serpent. In the same way, the Son of Man had to be lifted up—anticipating His death on the cross.

The phrase “must” shows that this event was part of God’s purpose. The cross was not a historical accident, but the means by which God would accomplish His work of redemption (Luke 24:26; Acts 2:23).

7. The eternal purpose: life for the one who believes

“so that whoever believes will in Him have eternal life.” (v. 15)

Here the expression “eternal life” appears for the first time in John’s Gospel. Jesus reveals that the purpose of His sacrifice is that everyone who believes in Him receives life. This life is not obtained by human effort, but by faith in the Son of Man who is lifted up.

This verse anticipates the message that will be developed in John 3:16 and presents the heart of the gospel: eternal life is God’s gift for everyone who believes. It is not only a future life, but a new life that begins now and consists in knowing God through Christ (John 17:3).

Theological implications:

• Jesus is the heavenly Revealer: He descended from heaven and has authority to make known divine realities.

• Unbelief prevents understanding spiritual truth: Even religious leaders can fail to grasp Jesus’ teaching if they reject His testimony.

• Christ’s sacrifice is necessary for salvation: The Son of Man had to be lifted up so that everyone who believes in Him would have life.

• Eternal life is God’s gift to everyone who believes in the Son.

Spiritual applications:

• Do not trust in your religion or knowledge: Like Nicodemus, you may be respected and well-trained, but religion and knowledge alone do not give access to the Kingdom.

• Believe the testimony of Christ: He speaks with divine authority, and His word is true and trustworthy.

• Look to the lifted-up Christ: Just as the Israelites looked at the serpent to live, look to Christ crucified and trust Him to receive eternal life.

• Keep the gospel centered on the cross: The essential message is Christ’s work, through which God offers forgiveness and eternal life.

Summary:

In John 3:9–15, the dialogue between Jesus and Nicodemus continues. The Lord reveals the lack of understanding and faith even among religious leaders, and He affirms that only He—having descended from heaven—has authority to speak of divine realities. Then He announces that the Son of Man must be lifted up, anticipating His death on the cross, so that everyone who believes in Him will have eternal life. This passage shows that eternal life is God’s gift to those who place their faith in the Son, and that Christ’s work is the foundation of salvation.

Final Prayer

Heavenly Father, we thank You because in Your love You have revealed the way of salvation through Your Son. We acknowledge that on our own we cannot understand spiritual realities or attain eternal life, and that only You can open our understanding and our hearts.

Lord, help us not to trust in our knowledge, our religion, or our efforts, but to believe fully in Jesus Christ—the Son of Man who was lifted up for our salvation. Give us a simple, sincere, and steadfast faith that looks to the cross and rests in the perfect work You have provided.

Open our eyes to value the gift of eternal life and to live each day in fellowship with You. And help us keep our hearts centered on the gospel, faithfully proclaiming that in Christ there is forgiveness, hope, and life for everyone who believes.

We ask this in the name of our Lord Jesus Christ. Amen.