1 John 5:10-13

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.

Assurance of Eternal Life

5:13 I have written these things to you who believe in the name of the Son of God so that you may know that you have eternal life.