Notes
"The Elder"? - Again references bieng made as to those older in the faith. John bieng Older writing to other believers"The elect Lady and her children"? - I believe this is a person. To say the "Lady" is the Church and the children the
Again Odd to be speaking through a non-personal entity to get to members, insteadd of talking to the members directly.
"children of your elect sister". Seems odd, because in 3 John he simply would say "brothers" or "friends" if referring to other members of the Church.
Children could be spiritual in the same way he speaks in 3 John. Or possibly physicaly
She and her children are loved by John and also all believers ("those who have come to know the truth")
Also "loves in truth" - real genuine Love, that comes only from God, "because of the truth that remains in us and will be with us forever"
Christians are those who have come to "know the truth" and that truth "remains in us and will be with us forever".