Jesus answered, “Very truly I tell you, no one can enter the kingdom of God unless they are born of water and the Spirit. (John 3:5 [NIV])
John 3:5 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.
John 3:6 That which is born of the flesh is flesh; and that which is born of the Spirit is spirit.
John 3:7 Marvel not that I said unto thee, Ye must be born again.
Everyone who has ever been born is born of water. Israel must be born again, resurrected
Nicodemus was a "master of Israel". He should have known that being born again (born of the Spirit), that it was resurrection as in Ezekiel 37 (dry bones). Read about it.
John 3:10 Jesus answered and said unto him, Art thou a master of Israel, and knowest not these things?
And unless you are willing to claim that you can walk through walls, you are NOT born again
John 3:8 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.
Jesus was "born again".
Luke 24:30 And it came to pass, as he sat at meat with them, he took bread, and blessed it, and brake, and gave to them.
Luke 24:31 And their eyes were opened, and they knew him; and he vanished out of their sight.
Luke 24:32 And they said one to another, Did not our heart burn within us, while he talked with us by the way, and while he opened to us the scriptures?
Luke 24:33 And they rose up the same hour, and returned to Jerusalem, and found the eleven gathered together, and them that were with them,
Luke 24:34 Saying, The Lord is risen indeed, and hath appeared to Simon.
Luke 24:35 And they told what things were done in the way, and how he was known of them in breaking of bread.
Luke 24:36 And as they thus spake, Jesus himself stood in the midst of them, and saith unto them, Peace be unto you.
Luke 24:37 But they were terrified and affrighted, and supposed that they had seen a spirit.
Luke 24:38 And he said unto them, Why are ye troubled? and why do thoughts arise in your hearts?
Luke 24:39 Behold my hands and my feet, that it is I myself: handle me, and see; for a spirit hath not flesh and bones, as ye see me have.
Believers today who are in Christ after trusting the Lord believing the word of truth (1 Corinthians 15:1-4) are a "new creature" NOT "born again"
2 Corinthians 5:17 Therefore if any man be in Christ, he is a new creature: old things are passed away; behold, all things are become new.