“Nathanael answered and saith unto him, Rabbi, thou art the Son of God; thou art the King of Israel.”
King James Version (KJV)
1:49 Nathanael answered - Happy are they that are ready to believe, swift to receive the truth and grace of God. Thou art the Son of God - So he acknowledges now more than he had heard from Philip: The Son of God, the king of Israel - A confession both of the person and office of Christ.
Joh 1:49 Thou art the Son of God; thou art the King of Israel. Philip had said, "Jesus, the son of Joseph" (Joh 1:45), as he supposed, but Nathanael, convinced, declared him the Son of God. This is the first confession of the divinity of Jesus.