Acts 18:9

Then spake the Lord to Paul . . . by a vision, Be not afraid . . . no man shall set on thee to hurt thee, &c.--From this it would seem that these signal successes were stirring up the wrath of the unbelieving Jews, and probably the apostle feared being driven by violence, as before, from this scene of such promising labor. He is reassured, however, from above.

In this chapter we have, I. Paul's coming to Corinth, his private converse with Aquila and Priscilla, and his public reasonings with the Jews, from whom, when they rejected him, he turned to the Gentiles (Act 18:1-6). II. The great success of his ministry there, and the encouragement Christ gave him in a vision to continue his labours there, in hopes of further success (Act 18:7-11). III. The molestations which after some time he met with there from the Jews, which he got pretty well through by the coldness of Gallio, the Roman governor, in the cause (Act 18:12-17). IV. The progress Paul made through many countries, after he had continued long at Corinth, for the edifying and watering of the churches which he had founded and planted, in which circuit he made a short visit to Jerusalem (Act 18:18-23). V. An account of Apollo's improvement in knowledge, and of his usefulness in the church (Act 18:24-28).

18:9-10 Paul had experienced real opposition in Corinth (18:6) and apparently was afraid of being attacked again, so the divine message was a comfort to him (cp. 23:11; Ps 34:4, 7, 19; Matt 28:20), encouraging him to persist in his public ministry and promising God’s protection (cp. Ps 91:11; 2 Tim 4:17).