Nathanael answered and said to Him, Rabbi, You are the Son of God. You are the King of Israel!
He who believes on Him is not condemned, but he who does not believe is condemned already, because he has not believed in the name of the only-begotten Son of God.
And immediately he proclaimed Christ in the synagogues, that He is the Son of God.
1 John 5:10-12
He who believes on the Son of God has the witness in himself. He who does not believe God has made
Him a liar, because he does not believe the record that God gave of His Son.
And this is the record, that God has given to us everlasting life, and this life is in His Son.
He who has the Son has life; he who does not have the Son of God does not have life.