Walking in the Truth
John expresses joy at finding some of the children walking in the truth in accordance with the Father's command. He then urges the dear lady to continue in the old commandment to love one another. This is not a new innovation but the original message the church has heard from the beginning. John defines love as walking according to God's commandments and restates the command that they must walk in love. The paragraph shows that truth, love, and obedience belong together as one pattern of faithful life.
I4 was overjoyed to find some of your children walking in the truth, just as the Father has commanded us. 5And now I urge you, dear lady — not as a new commandment to you, but one we have had from the beginning — that we love one another. 6And this is love, that we walk according to His commandments. This is the very commandment you have heard from the beginning, that you must walk in love.