20. And we [have seen and] know [positively] that the Son of God has [actually] come to this world and has given us understanding and insight [progressively] to perceive (recognize) and come to know better and more clearly Him Who is true; and we are in Him Who is true–in His Son Jesus Christ (the Messiah). This [Man] is the true God and Life eternal.
21. Little children, keep yourselves from idols (false gods)–[from anything and everything that would occupy the place in your heart due to God, from any sort of substitute for Him that would take first place in your life]. Amen (so let it be).