| 1 John 1:10Amplified Bible - Classic EditionIf we say (claim) we have not sinned, we contradict His Word and make Him out to be false and a liar, and His Word is not in us [the divine message of the Gospel is not in our hearts].See the chapter | 
He who believes in the Son of God [who adheres to, trusts in, and relies on Him] has the testimony [possesses this divine attestation] within himself. He who does not believe God [in this way] has made Him out to be and represented Him as a liar, because he has not believed (put his faith in, adhered to, and relied on) the evidence (the testimony) that God has borne regarding His Son.
I write to you, fathers, because you have come to know (recognize, be conscious of, and understand) Him Who [has existed] from the beginning. I write to you, young men, because you are strong and vigorous, and the Word of God is [always] abiding in you (in your hearts), and you have been victorious over the wicked one.
Let the word [spoken by] Christ (the Messiah) have its home [in your hearts and minds] and dwell in you in [all its] richness, as you teach and admonish and train one another in all insight and intelligence and wisdom [in spiritual things, and as you sing] psalms and hymns and spiritual songs, making melody to God with [His] grace in your hearts.