Don't marvel that I said to you, 'You must be born anew.'
First, None but Christ was able to reveal to us the will of God for our salvation. Nicodemus addressed Christ as a prophet; but he must know that he is greater than all the Old-Testament prophets, for none of them had ascended into heaven. They wrote by divine inspiration, and not of their own knowledge; see John 1:18. Moses ascended into the mount, but not into heaven. No man hath attained to the certain knowledge of God and heavenly things as Christ has; see Matthew 11:27. It is not for us to send to heaven for instructions; we must wait to receive what instructions Heaven will send to us; see Proverbs 30:4 Deuteronomy 30:12.