Jesus answered...
"Verily verily I say unto thee, except that a man be born of water and of the Spirit, he cannot enter into the kingdom of God. 

That which is born of the flesh, is flesh:and that that is born of the Spirit, is spirit.

Marvel not that I said to thee, Ye must be born again.

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 man that is born of the Spirit.

how then do you answer?  like that of Nicodemus, to whom Jesus was speaking?  He wondered HOW such things could be.. Jesus told him that we would speak of what we know.. we can only testify to what we have seen... that he'd not be able to receive our witness... to tell him earthly things.. to give him justifiable reasons to believe perhaps? would not CONVINCE Nicodemus to unto salvation... ultimately...  Jesus says THIS...

For no man ascendeth up to heaven, but that had descended from heaven, that Son of man which is in heaven.

And as Moses lifted up the serpent in the wilderness, so must that Son of man be lifted up.

That whosoever believeth in him, should not perish, but have eternal life.

For God so loveth the world, that he hath given his only begotten Son, that whosoever believeth in him, should not perish, but have everlasting life. 

For God sent not his Son into the world, that he should condemn the world, but that the world through him might be saved.

He that believeth in him, is not condemned: but he that believeth not, is condemned already, because he hath not believed in the Name of that only begotton Son of God. 

And this is the condemnation, that the ligth came into the world, and men loved darkenss rather than that light, because their deeds were evil.

For every man that evil doeth, hateth the light, neither cometh to light, lest his deeds should be reproved. 

But he that doeth truth, cometh to the light, that his deeds might be made manifest, that the are wrought according to God."

thoughts welcomed.........
may we walk together in the light...
may we reprove, and believe, and rejoice in His love..........