What Is a Church? Your Thoughts, Please

This is a short post asking for your feedback. I suggest there are six marks of an authentic Christian church. Would you add or subtract anything? 

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I’ve spoken in about five hundred churches, representing almost every major denomination, geographic location (all fifty states and a bunch of countries), and demographics. Very few are alike, but they are all called “church.” Not every organization that calls itself a church is necessarily a church, however.