Notes On 3 John
What we can learn from Gaius, Diotrephes and Demetrius
The Elder wrote his 2nd epistle to a wealthy woman telling her not to open her doors to preachers of a false gospel.
In this one, he writes to a wealthy man, Gaius, telling him to open his doors to preachers of the true gospel.
He talks of a prospering soul. One of the greatest blessing on earth is to have a prospering soul.