18  We know that everyone begotten of God does not sin; but he that was begotten of God keeps himself, and the evil [one] does not touch him.

19  We know that we are from God, and the whole world lies [under the sway] of the evil [one].

19  And we know that we are of God, and the whole world lies in wickedness.

20  And we know that the Son of God has come and has given us an understanding, that we may know Him that is true; and we are in Him that is true, in His Son Jesus Christ. He is the true God and eternal life.

21  Little children, guard yourselves from idols. Amen.

21  [My] little children, guard yourselves from idols.

21  My children, keep yourselves from idols.