What does the Bible say about salvation by grace or law?

In Acts 15, a significant debate arose concerning the necessity of circumcision and adherence to the law for salvation. The apostles, including Peter, made it clear that salvation comes through the grace of the Lord Jesus Christ alone. Paul and Barnabas affirmed that both Jews and Gentiles are saved by grace without the yoke of the law, demonstrating that human efforts or adherence to the law cannot justify anyone. As Paul stated, righteousness cannot come through the law, for if it could, Christ's sacrifice would have been unnecessary.