In Context

10 He who is believing in the Son of God, hath the testimony in himself; he who is not believing God, a liar hath made Him, because he hath not believed in the testimony that God hath testified concerning His Son;

11 and this is the testimony, that life age-during did God give to us, and this — the life — is in His Son;

12 he who is having the Son, hath the life; he who is not having the Son of God — the life he hath not.

13 These things I did write to you who are believing in the name of the Son of God, that ye may know that life ye have age-during, and that ye may believe in the name of the Son of God.

14 And this is the boldness that we have toward Him, that if anything we may ask according to his will, He doth hear us,

15 and if we have known that He doth hear us, whatever we may ask, we have known that we have the requests that we have requested from Him.

1 John 5:13 in Other Translations