30:16 In his speech Demetrius had said, "This our craft is in danger." These words reveal the real cause of the tumult at Ephesus, and also the cause of much of the persecution which followed the apostles in their work. Demetrius and his fellow craftsmen saw that by the teaching and spread of the gospel the business of image making was endangered. The income of pagan priests and artisans was at stake, and for this reason they aroused against Paul the most bitter opposition.