1 John 5:10-12

5:10 (The one who believes in the Son of God has the testimony in himself; the one who does not believe God has made him a liar, because he has not believed in the testimony that God has testified concerning his Son.) 5:11 And this is the testimony: God has given us eternal life, and this life is in his Son. 5:12 The one who has the Son has this eternal life; the one who does not have the Son of God does not have this eternal life.

1 John 5:20

5:20 And we know that the Son of God has come and has given us insight to know him who is true, and we are in him who is true, in his Son Jesus Christ. This one is the true God and eternal life.