| Geneva Study Bible For a great door and {d} effectual is opened unto me, and there are many adversaries. (d) Very fit and convenient to do great things by. People's New Testament 16:9 For a great door and effectual is opened. His ministry in Ephesus was very successful. See Ac 19:20. There are many adversaries. Demetrius and his fellow-craftsmen had probably begun their agitation (Ac 19:23-41). Wesley's Notes 16:9 A great door - As to the number of hearers. And effectual - As to the effects wrought upon them. And there are many adversaries - As there must always be where Satan's kingdom shakes. This was another reason for his staying there. Jamieson-Fausset-Brown Bible Commentary 9. door-(2Co 2:12). An opening for the extension of the Gospel. Wise men are on the watch for, and avail themselves of, opportunities. So "door of hope," Ho 2:15. "Door of faith," Ac 14:27. "An open door," Re 3:8. "A door of utterance," Col 4:3. "Great," that is, extensive. "Effectual," that is, requiring great labors [Estius]; or opportune for effecting great results [Beza]. many adversaries-who would block up the way and prevent us from entering the open door. Not here false teachers, but open adversaries: both Jews and heathen. After Paul, by his now long-continued labors at Ephesus, had produced effects which threatened the interests of those whose gains were derived from idolatry, "many adversaries" arose (Ac 19:9-23). Where great good is, there evil is sure to start up as its antagonist. Matthew Henry's Concise Commentary 16:1-9 The good examples of other Christians and churches should rouse us. It is good to lay up in store for good uses. Those who are rich in this world, should be rich in good works, 1Ti 6:17,18. The diligent hand will not make rich, without the Divine blessing, Pr 10:4,22. And what more proper to stir us up to charity to the people and children of God, than to look at all we have as his gift? Works of mercy are real fruits of true love to God, and are therefore proper services on his own day. Ministers are doing their proper business, when putting forward, or helping works of charity. The heart of a Christian minister must be towards the people among whom he has laboured long, and with success. All our purposes must be made with submission to the Divine providence, Jas 4:15. Adversaries and opposition do not break the spirits of faithful and successful ministers, but warm their zeal, and inspire them with fresh courage. A faithful minister is more discouraged by the hardness of his hearers' hearts, and the backslidings of professors, than by the enemies' attempts. | 
