John 3 vs1-12 A Secret Admirer

(John 3:1-21, New King James Version)

Nicodemus was one of the "rulers" of the Jews. Herod was the king, but the poeple who called the shots were the Sanhedrin, the ruling council of religious leaders.
Nicodemus comes to Jesus in secret for a reason. Public discussions with Jesus are contentious for the Pharisees. If Nicodemus wants a non-confrontational discussion with Jesus, it has to be in private.

Nic (can I call you Nic?) says to Jesus: 'We (others also?) know you're from God because of the signs." This implies that Jesus had been performing more miracles after the wedding. But they wanted a sign that He was more than a teacher. 

Once again, Jesus seems to ignore what He was just told and gets to the point."You must be born again." 

Jesus is speaking one language and Nic is speaking another. Jesus points out that He is speaking on a level above Nic's understanding. Nic's gotta play catch-up. 

"I have told you earthly things and you do not believe, how will you believe if I tell you heavenly things?"  

Does this imply that Jesus thinks that Nicodemus thought Jesus could impart something to Him, that Nic had a yearning for more?

He's going to get more. He's going to hear God's plan: That the Son of Man must be lifted up as a sacrifice (like the snake in the wilderness was a type of) and that belief on this sacrifice was the "great escape" from condemnation.

This is the crown jewel of Scripture:

"¹⁶ For God so loved the world that He gave His only begotten Son, that whoever believes in Him should not perish but have everlasting life. ¹⁷ For God did not send His Son into the world to condemn the world, but that the world through Him might be saved." 

But we are condemned by our unbelief. And saved by our belief.

Some people believe that Nicodemus was approaching Jesus at night, in secret, because he feared being seen with Him by his buddies on the council. When Jesus died Nicodemus was so bold as to ask to bury the body, forever associating himself with Jesus (and endangering himself in the process). 

Nic may have been trying to get Jesus to "come on board" with the council, give the 'new guy" a few tips, but Jesus would only have association with men on His terms, not theirs.