Acts 13:39

And by him all that believe are justified from all things, from which ye could not be justified by the law of Moses.

Paul spoke these words in the synagogue at Antioch in Pisidia on the Sabbath, after rehearsing how the Lord had dealt with the Jews from deliverance from Egyptian bondage onward. There he preached Jesus as the promised Messiah and Savior, the Messiah of prophecy promised of the seed of David.

By Him everyone who believes is justified from all things from which the law of Moses could not justify them. Through His merits believers receive forgiveness of sins and are cleared.

This salvation and good news is offered to Gentiles as well as Jews alike. Gentiles were not to be excluded from God's blessings. In this offer Gentiles are recognized as the children of God on an equality with Jews.

The believing Gentiles received this with exceeding joy. The Jews in envy, jealousy, bigotry and exclusiveness rejected the blessing as reserved for themselves alone and judged themselves unworthy of everlasting life. So Paul and Barnabas turned without hesitation to the Gentiles to be a light of the Gentiles for salvation unto the ends of the earth.

The verse is part of the light given in the thirteenth chapter of Acts that is to be studied to humble the heart before God and to seek the Lord most earnestly. It shows that the Lord will not encourage false theories and a low standard. It calls for a higher moral standard to be upraised and maintained.