In the Bible, John 3:3 is a verse where Jesus speaks to Nicodemus, a Pharisee. He tells Nicodemus that to see the kingdom of God, one must be "born again." This concept emphasizes the need for spiritual rebirth rather than just physical birth, indicating a transformation in one's life and beliefs. The phrase "born again" suggests a new beginning and a deeper understanding of faith. It highlights the importance of spiritual renewal and the necessity of accepting Jesus and his teachings to enter the kingdom of God. This verse is foundational in Christian theology regarding salvation and spiritual awakening.