[editor-surveyor]

> “The writers of the epistles seem to intend them to churches that are already going concerns.”

.
Yes, as they were obviously continuation of synogogues that had been going for probably over a century. They needed instruction, and clarification, which Paul in particular gave them in great detail.

[maryz]

They had already received the faith and were established — the epistles encourage and correct and elaborate on the faith already received, but they don’t lay it out from scratch.

[Natural Law]

"Yes, as they were obviously continuation of synogogues that had been going for probably over a century."

Not so obvious since they were letters to Gentiles and not Jews.