The Truth About the ‘Synagogue of Satan’

What did the Lord mean when He used the words synagogue of Satan in His revelation to His beloved apostle John in Revelation 2:9 and 3:9? The Greek word translated “synagogue” literally means “an assembly.” The word Satan means “adversary.” So John was told that the believers in Smyrna and Philadelphia would suffer persecution from “an assembly of the adversary”—literally, “