New American Standard Bible (NASB)
1 John 5
20 And we know that the Son of God has come, and has given us understanding so that we may know Him who is true; and we are in Him who is true, in His Son Jesus Christ. This is the true God and eternal life.
21 Little children, guard yourselves from idols.
2 John 1
1 The elder to the chosen lady and her children, whom I love in truth; and not only I, but also all who know the truth,
2 for the sake of the truth which abides in us and will be with us forever:
3 Grace, mercy and peace will be with us, from God the Father and from Jesus Christ, the Son of the Father, in truth and love.
4 I was very glad to find some of your children walking in truth, just as we have received commandment to do from the Father.
5 Now I ask you, lady, not as though I were writing to you a new commandment, but the one which we have had from the beginning, that we love one another.
6 And this is love, that we walk according to His commandments. This is the commandment, just as you have heard from the beginning, that you should walk in it.
7 For many deceivers have gone out into the world, those who do not acknowledge Jesus Christ as coming in the flesh. This is the deceiver and the antichrist.
8 Watch yourselves, that you do not lose what we have accomplished, but that you may receive a full reward.
9 Anyone who goes too far and does not abide in the teaching of Christ, does not have God; the one who abides in the teaching, he has both the Father and the Son.