Expositor's Bible Commentary Commentary Acts 18:4

"And he reasoned in the synagogue every sabbath, and persuaded Jews and Greeks." — Acts 18:4 (ASV)

While working with Aquila and Priscilla, Paul attended the local synagogue every Sabbath. There, Luke tells us, “he reasoned” (GK 1363) with those gathered, “trying to persuade” both Jews and Gentiles. But his ministry during those weeks seems to have been relatively unobtrusive, probably conforming to the kind of witness Aquila and Priscilla were already carrying on among the Jews.