Testifying both to the Jews, and also to the Greeks, repentance toward God, and faith toward our Lord Jesus Christ. Testify both to - Jews and - Greeks - He always began with the Jews; and, in this case, he had preached to them alone for three months, Acts 19:8-10, and only left their synagogues when he found, through their obstinacy, he could do them no good.
Repentance toward God, etc. - As all had sinned against God, so all should humble themselves before him against whom they have sinned; but humiliation is no atonement for sin; therefore repentance is insufficient, unless faith in our Lord Jesus Christ accompany it. Repentance disposes and prepares the soul for pardoning mercy; but can never be considered as making compensation for past acts of transgression. This repentance and faith were necessary to the salvation both of Jews and Gentiles; for all had sinned, and come short of God's glory. The Jews must repent, who had sinned so much, and so long, against light and knowledge. The Gentiles must repent, whose scandalous lives were a reproach to man. Faith in Jesus Christ was also indispensably necessary; for a Jew might repent, be sorry for his sin, and suppose that, by a proper discharge of his religious duty, and bringing proper sacrifices, he could conciliate the favor of God: No, this will not do; nothing but faith in Jesus Christ, as the end of the law, and the great and only vicarious sacrifice, will do; hence he testified to them the necessity of faith in this Messiah. The Gentiles might repent of their profligate lives, turn to the true God, and renounce all idolatry: this is well, but it is not sufficient: they also have sinned, and their present amendment and faith can make no atonement for what is past; therefore, they also must believe on the Lord Jesus, who died for their sins, and rose again for their justification.