Dennis E. Johnson
God, in his providence, designed all the events of the first century Church so that various crises came up in churches when apostles couldn't get there soon enough, or in person. So they wrote letters.
When courtesy becomes cruelty.
God is our shield and our great reward.
In his epistle, John exhorts us to follow God's commandment of loving one another.
God has brought together his truth in Father , Son, and Holy Spirit; let not our conception of him separate these.