Yeshua definitely was directly explaning the new, incorruptible body that one must have to enter the kingdom.
The same body that Paul spoke of
1Corinthians 15:
[52] In a moment, in the twinkling of an eye, at the last trump: for the trumpet shall sound, and the dead shall be raised incorruptible, and we shall be changed.
[53] For this corruptible must put on incorruption, and this mortal must put on immortality.
[54] So when this corruptible shall have put on incorruption, and this mortal shall have put on immortality, then shall be brought to pass the saying that is written, Death is swallowed up in victory.
Peter was definitely not speaking of this, he was speaking of the baptism of the Holy Spirit.
At the time that Yeshua spoke to Nicodemus, Judah had no knowledge of the coming gift of the spirit, so Yeshua would have had zero reason to ridicule Nicodemus for not knowing of it.
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Yeah, like whether the Greek word means woman or fire.
>>Yeshua definitely was directly explaning the new, incorruptible body that one must have to enter the kingdom.<<
No, he wasn't. The concept of being born again was applied to those who were still alive on this earth as I showed you. When people are "born again" of the Spirit by believing on Jesus as Lord and Saviour it's the beginning of their eternal life as Jesus said in verse 15.
>>Peter was definitely not speaking of this, he was speaking of the baptism of the Holy Spirit.<<
The indwelling of the Holy Spirit only happens to those who have been "born again" and have "life eternal".