Exactly , no one has ascended and came back from heaven to earth .
In John Chapter 3 Jesus is talking to Nicodemus and Jesus is telling him that no one has ascended to heaven in such a way as to return and talk about heavenly things. Jesus want Nicodemus to understand that it is only Jesus that has first hand knowledge of heaven and can tell of it on earth at this time .
Where are Enoch and Elijah ? I believe they are where God wants them to be for right now .
I think Enoch and Elijah will be the two witnesses spoken of in Revelation .
Every man is appointed once to die .
My thoughts anyway .
What it really says is what goes up must come down.
And furthermore, it had to have first come down before it could ever have gone up.
Sound the trumpets!