1 John 5:9-12

9 If we receive the witness of men, the witness of God is greater; for this is the witness of God which He has testified of His Son.

10 He who believes in the Son of God has the witness in himself; he who does not believe God has made Him a liar, because he has not believed the testimony that God has given of His Son. 11 And this is the testimony: that God has given us eternal life, and this life is in His Son. 12 He who has the Son has life; he who does not have the Son of God does not have life.