And now I ask you, lady [See verse 1], not as though writing a new commandment to you, but [I wanted to remind you of] one that we had [heard] from the beginning [of Christ’s ministry]: [It is] that we should love one another.
Loved ones, we should have love for one another, because love comes from [the very nature of] God, and every person who [continually] loves [others] has been [spiritually] conceived by God [See 2:29; 3:9], and knows [he is in fellowship with] God.
And this is the [greatest] commandment [See Matt. 2:37-38] we have received from Him: [It requires] that the person who [claims to] love God should also love his brother.
Now to summarize: All of you should think alike. Be sympathetically understanding [toward one another]. Be loving toward [your] brothers [and sisters]. Be tender-hearted and humble-minded.
And this is the message we heard from Him, and [now want to] announce to you: God is light [i.e. righteousness] and in His [very nature] there is no trace of darkness [i.e., evil].
[Since] you have purified your souls by [your] obedience to the truth [i.e., the Gospel message], which produces a genuine love for your brothers, [now] you should have this kind of fervent, heartfelt love for one another.