What is the meaning of Acts 16:8-10?

8 And they passing by Mysia came down to Troas. 9 And a vision appeared to Paul in the night; There stood a man of Macedonia, and prayed him, saying, Come over into Macedonia, and help us. 10 And after he had seen the vision, immediately we endeavoured to go into Macedonia, assuredly gathering that the Lord had called us for to preach the gospel unto them. (Acts 16:8-10 KJV)

William Burkitt’s Commentary

These words are a relation of a message from heaven unto St. Paul, to direct him in his preaching and publishing of the gospel, both as to the place where, and as to the persons to whom, he was to deliver it.

Where note, The manner of it: it was by a vision, A vision appeared. The time of it, it was in the night, the bringer of it, a man of Macedonia: the matter of it, help for the Macedonians, interpreted (ver. 10) to be by the preaching of the gospel. Of all distresses, want of the gospel cries loudest for relief and help; for by want of the gospel, they want everything that is worth having; they want Jesus Christ, who is revealed only by the gospel; they want communion with God, they want the comforts and refreshments of ordinances, and they will at last want heaven and salvation. But that which is most deplorable is this: Those that want the gospel, though they want all these things, yet are they not sensible that they want anything.

Learn, 2. That the sending of the gospel to one nation, place, or people, and not to another, proceeds from the determinate will and pleasure; Stay not in Asia, go not into Bithynis, but come over into Macedonia; Even so, Father, for thus it seemed good in thy sight.