I have a couple of questions regarding John 3.
"6 That which is born of the flesh is flesh, and that which is born of the Spirit is spirit.[c] 7 Do not marvel that I said to you, ‘You must be born anew.’[d] 8 The wind[e] blows where it wills, and you hear the sound of it, but you do not know whence it comes or whither it goes; so it is with every one who is born of the Spirit.” 9 Nicode′mus said to him, “How can this be?” "13 No one has ascended into heaven but he who descended from heaven, the Son of man."
These verses are from Gospel of John chapter 3. Could someone elaborate on the meaning of verses 7 and 8? I understand that Nicodemus does not comprehend the idea of being born anew, but I don't understand the allegory of the wind. Does it mean that we can only witness miracles, but never fully understand them in depth?
I also have a question about verse 13. I thought that Elijah had ascended into heaven, what am I missing?