1st John 5:12

9 If we take the witness of men to be true, the witness of God is greater: because this is the witness which God has given about his Son.

10 He who has faith in the Son of God has the witness in himself: he who has not faith in God makes him false, because he has not faith in the witness which God has given about his Son.

11 And his witness is this, that God has given us eternal life, and this life is in his Son.

12 He who has the Son has the life; he who has not the Son of God has not the life.

13 I have put these things in writing for you who have faith in the name of the Son of God, so that you may be certain that you have eternal life.

14 And we are certain that if we make any request to him which is right in his eyes, he will give ear to us:

15 And if we are certain that he gives ear to all our requests, we are equally certain that we will get our requests.