If Christ defeated the demons at Calvary, what is the urgency behind spiritual warfare?
Revelation answers this question. Each of the seven letters identifies a particular challenge which the Christians in that city must conquer.
The Ephesians have forsaken their first love (2.4-5). The Christians in Smyrna face persecution (2.10), as do those in Philadelphia (3.8-9). The church in Pergamum is tempted to indulge in idol food, sexual immorality, and heresy (2.14-15), as are the believers living in Thyatira (2.20-22). Those in Sardis are apathetic about their faith (3.2-3). The Laodiceans are arrogant yet impoverished (3.17-18).
