If water baptism were required to receive eternal life, John 3 would have been the perfect place for Jesus to say so.
Nicodemus came to Jesus by night. He was not ignorant of religion. He was a Pharisee and a ruler of the Jews.
If anyone understood ceremonies, washings, commandments, and religious obligations, Nicodemus did. Yet when Jesus spoke to him about being born again, the Lord did not point him to religious performance. He pointed him to faith.
"Except a man be born again, he cannot see the kingdom of God."
— John 3:3
This was not a minor subject. Jesus was speaking about entrance into the kingdom of God. If baptism were required in order to receive eternal life, this would have been the perfect moment for Jesus to say so.
But He did not. That matters, especially when compared with the broader question of whether water baptism is required for salvation.
Nicodemus did not understand. He asked:
"How can a man be born when he is old?"
— John 3:4
Jesus continued explaining the new birth, but He never told Nicodemus to be baptized in water. Instead, He eventually pointed him to faith in the Son of God.
Jesus used an Old Testament picture Nicodemus would have known well:
"And as Moses lifted up the serpent in the wilderness, even so must the Son of man be lifted up:
That whosoever believeth in him should not perish, but have eternal life."
— John 3:14–15
In Numbers 21, the Israelites were not told to perform a ritual to be healed. They were told to look. The look was an act of faith.
Jesus used that event as a picture of believing in Him. This agrees with the same simple promise seen in John 6:47: the one who believes has everlasting life.
"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
The condition is not baptism. The condition is not religious reform. The condition is not lifelong performance. The condition is belief in Christ.
This is the same pattern seen in John 5:24, where the believer already has everlasting life, shall not come into condemnation, and has passed from death unto life.
Jesus did not tell Nicodemus:
He said, "Whosoever believeth in him should not perish, but have everlasting life." That also agrees with John 10:28–29, where Jesus says His sheep shall never perish.
Yes. Water baptism is important. It is a public identification with Christ. It is an act of obedience for believers. It is a powerful picture of death, burial, and resurrection.
But baptism is not the condition for receiving everlasting life. If it were, Jesus would not have left it out while explaining the new birth to Nicodemus.
This is why the answer given to the Philippian jailer is so important: "Believe on the Lord Jesus Christ, and thou shalt be saved." Baptism followed, but belief was the answer to the salvation question.
John's Gospel repeatedly presents belief as the condition for eternal life.
Jesus said, "He that believeth on me hath everlasting life." Jesus said the believer shall never die in John 11:25–26. The message is consistent.
Believe in Christ and receive life.
Many people are told they cannot be saved unless they are baptized. Others are told that faith is not enough.
But Jesus' conversation with Nicodemus says otherwise. When explaining the new birth, Jesus pointed to faith in Himself. He promised everlasting life to the one who believes.
That is not an accidental omission. It is the simplicity of the Gospel, the same simplicity seen in What Must I Do to Be Saved? and the thief on the cross.
Nicodemus came to Jesus needing to understand the new birth. Jesus did not give him a religious checklist. Jesus did not tell him to be baptized.
Jesus pointed him to the Son of Man lifted up and gave him the promise of John 3:16:
"Whosoever believeth in him should not perish, but have everlasting life."
If baptism were required for receiving eternal life, John 3 would have been the place to say it.
Instead, Jesus said believe.