3 John 1:9
9I wrote to the assembly, but Diotrephes, who loves to be first among them, doesn’t accept what we say.
The elder had written to the assembly, but Diotrephes, who loves to be first, does not acknowledge our authority. Wesley: probably the church to which the brothers came; Diotrephes perhaps its pastor, who loves to govern all things according to his own will. Receiveth us not—neither them nor me. So did the mystery of iniquity already work.
Pastoral church order: first-place love that will not receive the apostle or his letter. The sin named is preeminence that refuses apostolic authority and, in v. 10, the brothers sent for the Name.
Written to the church; Diotrephes puts himself first and will not acknowledge the elder. Calvin did not comment the name; the Johannine analogue is those who will not hear the apostolic “we” (1 John 4:6) and who go out from the fellowship.
This is order in a congregation, not a brief on contemporary platforms. First-place is the diagnosis. Authority refused is the elder’s, tied to the truth of vv. 1–8. Keep the scene in that church.