19:10 two years. Compare Acts 20:31, indicating the Paul actually spent about three years altogether ministering in Ephesus.

19:10 dwelt in Asia. Although Paul himself probably did not travel around the province of Asia, many of his Ephesian converts did. It was probably during this period that the “seven churches of Asia” (Revelation 2 and 3), as well as the churches at Colosse and Hierapolis were founded. Paul’s letter to the Colossians indicates that he had not actually visited Colosse (note Colossians 1:4; 2:1), but knew all about it. The key role of Ephesus is further indicated by the fact that, according to firm testimony of the early Christians, the Apostle John later became its chief bishop, and that the first of the seven letters sent through him by Christ to the churches was directed to the church at Ephesus (Revelation 2:1-7).