King James Bible
"Marvel not that I said unto thee, Ye must be born again."
Jesus addresses Nicodemus's astonishment at the teaching of spiritual rebirth. The command not to marvel suggests this truth, while surprising to human reasoning, is fundamental to God's kingdom—a gentle rebuke to the learned Pharisee who should understand spiritual realities. The necessity ('must') of spiritual rebirth is absolute and universal, applying to all people regardless of religious standing. This new birth from above, distinct from physical birth, is the non-negotiable entry point into God's kingdom, emphasizing transformation over reformation.