Charles Spurgeon Commentary Acts 18:3-4

"and because he was of the same trade, he abode with them, and they wrought, for by their trade they were tentmakers. And he reasoned in the synagogue every sabbath, and persuaded Jews and Greeks." — Acts 18:3-4 (ASV)

He stepped into the synagogue, and when the time came for strangers to address the audience he began to argue that Jesus was the true Messiah. Nor did he argue in vain, for there were some who were persuaded. He endeavored to persuade them all, both the Jews and the Gentiles, who came together to listen to him.