In the book of John, chapter 3, a Pharisee named Nicodemus, known for his exceptional knowledge of scriptures, seeks Jesus for understanding. Despite his extensive knowledge, Jesus tells Nicodemus that he must be "born again" to enter the Kingdom of God. This concept confuses Nicodemus, as he equates it with the process Gentiles go through to convert to Judaism. Jesus clarifies that one must be born of water and the Spirit to enter the Kingdom of God. This profound conversation underscores the universal reach of Jesus' message of salvation.