16:9

a large door that leads to activity: This is one of three instances in which Paul uses the term “door” in a figurative sense. (2Co 2:12; Col 4:3; see study note on Ac 14:27.) Paul’s activity in Ephesus had an impact on the preaching efforts in the whole region. He spent some three years in Ephesus (c. 52-55 C.E.), and one result was that the good news of the Kingdom spread throughout the Roman province of Asia. (Ac 19:10, 26; see Glossary, “Asia.”) The cities of Colossae, Laodicea, and Hierapolis, which lay inland from Ephesus, heard the good news, though Paul evidently did not visit them in person. He may have sent Epaphras to open up the preaching work there. (Col 4:12, 13) It seems possible that the good news likewise reached the cities of Philadelphia, Thyatira, and Sardis during this time of great activity.