There was a man of the Pharisees, named Nicodemus, a ruler of the Jews: The same came to Jesus by night, and said unto him, Rabbi, we know that thou art a teacher come from God: for no man can do these miracles that thou doest, except God be with him. Jesus answered and said unto him, Verily, verily, I say unto thee, Except a man be born again, he cannot see the kingdom of God. Marvel not that I said unto thee, Ye must be born again John 3:1-3, 7

In this passage, Jesus had a discussion with a man called Nicodemus. Jesus was at home one night when Nicodemus came to Him.

Nicodemus was a very important person in town. The Bible says he was a ruler of the Jews, a master of Israel, a leader in the synagogues. Nicodemus went to see Jesus at night, so that all the people who respected him would not see him. 

This prominent Jewish leader said something to Jesus, which prompted Him to give an interesting reply. Nicodemus told Jesus that he recognized Him as a great man of God. Jesus saw right through him and replied, "You must be born again. You are a good person. I know you pay tithes and fast often. You are a Pharisee, and a ruler of the Jews, but you still need to be born again!" Now, the questions we have to ask ourselves are these: Why did Jesus tell Nicodemus that he had to be born again? Why did He launch out into this sermon? The word "born" means "to be produced or created". Therefore, to be "born again" means "to be produced or created again". There are lots of people doing all sorts of religious things. These things look "Christian", but they are not. Such people are not born again. There is no religion that requires a person to be born again. All the major religions of this world give instructions for following certain rules of conduct. There is, however, no religion that claims an inner new birth. Christianity stands alone in this claim! 

- Dag Heward Mills (Born Again)