In John chapter 3 we encounter a Pharisee named Nicodemus. Nicodemus perceives that because of his prestige and his piety, his entry into the Kingdom of God will be certain. But on the night he enquired of Jesus, his worldview was flipped upside down. Jesus tells him that to receive the Kingdom he needs a radical heart change that can only come about by the work of Spirit. Here we learn that entrance into the Kingdom of God is not something we earn through good works, but by believing in the finished work of the Son of Man who was lifted up on the cross for our sins.