So wonderful are the appointments of Providence, that we find a youth who took an active part in the murder of the first martyr to the Christian cause, and afterward breathed forth an unrelenting hostility against all its adherents, selected as the chief instrument of its extension in various countries. That mighty energy which "commanded the light to shine out of darkness," as he was on a persecuting expedition to Damascus, "shined into his heart," and by a miraculous interposition not only checked him in his career, but communicated to him "the light of the knowledge of the glory of God in the face of Christ Jesus," and turned all the energies of his character into a new and most important course of exertion. He became a Christian, a preacher, an apostle, and a missionary to the Gentile world: and while by his indefatigable labours he benefitted so large a proportion of his contemporaries, by his inspired epistles he has instructed the church 'of God in every succeeding age of the world. Paul appears to have travelled over a considerable portion of Asia and part of Europe. Barnabas, and afterward Silas and Timotheus, accompanied him. In many places he suffered great personal injury, and his valuable life was repeatedly endangered. Having passed through Phrygia and the proconsular province of Asia, of which Ephesus was the capital, Paul and Silas came at length to Troas, where the former had a vision, in which he saw an inhabitant of Macedonia standing before him, and uttering this request, "Come over and help us." This impressed his mind with a conviction that he was called in providence to preach the gospel in that part of Greece; and he immediately sailed down the Aegean Sea by the island of Samothracia and the port of Neapolis, and from thence to Philippi, which was a Roman colony. [45] In this city, whither it seems probable from the history, that Luke had accompanied them, they remained some days; and here we are introduced to the brief but instructive account of the excellent woman whose name is prefixed to this chapter.