Ekklēsia does not mean a building. It does not mean a denomination. It does not mean a membership roll or a 501(c)(3) or a brand of worship. It means 'the called-out ones.' An assembly summoned for a purpose.

In the Septuagint, ekklēsia translates the Hebrew qahal, the assembled congregation of Israel at Sinai, at the Tabernacle, before the Temple. Every time the Hebrew Bible speaks of the gathered people of HaShem, this is the word the Greek translators reached for. And when Stephen preaches his last sermon in Acts 7:38, he uses the same word to call the generation of Moses 'the ekklēsia in the wilderness.' Not a new institution. The same assembly.

This matters for Romans 11. When Paul warns the nations not to boast against the natural branches, he is not inviting them into a new organization that replaces Israel. He is inviting them into the recognition. Ekklēsia is the honest response of people, Jew and gentile, who see the rescue and say yes. It is not a ticket booth. It is not a replacement. It is a recognition.

The church bought the building and forgot the word. Strip the building away and the word comes back: you were called out of something, into Someone, to bear witness to a rescue you did not author.