The elder writes to the chosen lady and her children, whom he loves in truth, and not only he but all who know the truth, because of the truth that abides in us and will be with us forever. He wishes them grace, mercy and peace from God the Father and from Jesus Christ, the Father's Son, in truth and love (vv. 1-3).
He rejoices greatly to have found some of her children walking in the truth, just as the Father commanded. Now he asks her that we love one another: this is not a new commandment but one they had from the beginning. And this is love, that we walk according to his commandments, as they have heard from the beginning, so that they walk in it (vv. 4-6).
Many deceivers have gone out into the world, those who do not confess that Jesus Christ has come in the flesh; such a one is the deceiver and the antichrist. He asks them to watch themselves so as not to lose what they have worked for, but to receive a full reward. Anyone who goes on ahead and does not abide in the teaching of Christ does not have God; whoever abides in the teaching has both the Father and the Son. If anyone comes to you and does not bring this teaching, do not receive him into your house or give him a greeting, for whoever greets him takes part in his wicked works (vv. 7-11).
He has much to write but does not want to do it with paper and ink; he hopes to come and speak face to face so that their joy may be complete. The children of her chosen sister send greetings (vv. 12-13).