Acts 18:8

Crispus the chief ruler of the synagogue - This person held an office of considerable consequence; and therefore his conversion to Christianity must have been very galling to the Jews. It belonged to the chief or ruler of the synagogue to preside in all the assemblies, interpret the law, decide concerning things lawful and unlawful, punish the refractory, excommunicate the rebellious, solemnize marriages, and issue divorces. It is likely that, on the conversion of Crispus, Sosthenes was chosen to succeed him.

Many of the Corinthians - Those to whom the sacred historian refers were probably Gentiles, and were the fruits of the apostle's labors after he had ceased to preach among the Jews.

And Crispus - He is mentioned in 1 Corinthians 1:14 as having been one of the few whom Paul baptized with his own hands. The conversion of such a man must have tended greatly to exasperate the other Jews, and to further the progress of the Christian faith among the Corinthians.

With all his house - With all his family, Acts 10:2.

And many of the Corinthians - Many even in this voluptuous and wicked city. Perhaps the power of the gospel was never more signal than in converting sinners in Corinth, and rearing a Christian church in a place so dissolute and abandoned. If it was adapted to such a place as Corinth; if a church, under the power of Christian truth, could be organized there, it is adapted to any city, and there is none so corrupt that the gospel cannot change and purify it.

18:8 And many hearing - The conversation of Crispus, and the preaching of Paul.