In 2 John 1:1-13, John’s concern about Christians obeying the commandment concerning love is forcefully emphasized. The phrase “love one another” occurs 13 times in the New Testament. Jesus used it four times and said that believers’ love for each other would show that they were His disciples. The apostles Paul, Peter, and John reinforced this nine times in their letters. Genuine love for God is shown through obedience. Love and obedience are the result of the Holy Spirit’s work in the life of a believer. The truth that Christ is both God and man, Lord, and Saviour, is more than a set of propositions. It is living, and it abides forever.
False teachers, whom John calls deceivers and antichrists, were spreading false teachings. To keep walking in the truth was how John’s readers would defend against such teachings. Some people think that only the sincerity of one’s beliefs is important, but the truth of those beliefs is what matters. All truth is found in Jesus Christ, the eternal Son of God.