Ancient Thessalonica measures just about one square mile in area. Ditto for most cities Paul planted churches in. Even Rome & Jerusalem weren't too much bigger. To put that into perspective, map a few spots that are one-half-mile from your home in every direction. Now give that circle some corners and you'll have some idea how close the first Christians lived to one another.
But the first Christians weren't just accessible to one another, they were necessary. They needed each other. They no longer fit well with anyone in their towns apart from one another. For knowing Christ, THEY were all that THEY had. Each new Christian found in Jesus Christ had to also find out that their Lord was inside their new siblings as well. Thus, if they needed Him, then they needed each other.
Now try to imagine this: call a meeting for all church going folks, of any denominations, as long as they live in the same local Elementary School zone as yourself. In fact, hold the meeting there. Lots of people could actually walk to it. Then, perhaps in the cafeteria, organize a series of home meetings - by street, block or neighborhood.
I'll end the fantasy there. We could let our imaginations run wild, dreaming of wonderful hootenanies, or we can acknowledge the facts. This is most likely NOT going to happen so easily. And why not? Because we don't NEED each other that much.
Or do we?
Before you answer, please know that I'm not talking about keeping up good relationships with one's neighbors. I'm talking about people both near enough and devout enough to host 6 AM prayer meetings on a weekday. I'm talking about people who can walk around the corner just after dinner and who'd feel comfortable spending an hour together in somebody's spare room, just pursuing the Lord.
We so desperately need that. Most of us just don't know how badly.