( This is very short; and naturally not complete . You'll have to study this further. )
As John 1 says: He is the word from the beginning made flesh .
But, that's not what is being said here.
Christ ascended back to heaven from which He came at His defeating of death on the cross. Just as, all who live in the flesh, must ascend back up above; to heaven from where they came.
That is what the word "again" means in Greek its taken. Its very specific ( above ).
To repeat.
John 3:13 And no man hath ascended up to heaven, but he that came down from heaven,
( This is the process that all people must go through . No man will return to heaven( ascended ) but or unless; he came down ( born from above =greek; from heaven , first.)
even the Son of man which is in heaven.
( Even Christ who was in heaven, hath done this ) Hebrews 2:14. And many other places. As John chapter 1.
Born from above, into the water of the womb of a woman. Upon death, you return.
This is the very basic gist of this. But you have to correct the Greek here.
Consider the fallen angles: Genesis 6 , or Jude, they would not be born from above, then accepting Christs' Spirit ( born of the spirit ).
But instead went around that to cause their own death sentence eventually at the real Christ's return.
So we're not even talking about baptism here.
If anyone wants to talk these verses and the more over with me anytime they wish, im free, and inbox me.