“There is no knowledge of the Body of Christ propounded in Isaiah 15:9.”
Isaiah 15:9 should be Romans 15:9. I had someone speaking over my shoulder about Isaiah while I was typing.
All of the believers who we scattered from Jerusalem and Judea went everywhere preaching to none but to the Jews ONLY all the way through Acts chapter 11 (Acts 11:19).
How is any “perpetual” Church visible on Earth today like that group?