How is a person justified according to Galatians?

Answer: By faith in Christ

A person is not justified by works of the law, but by faith in Jesus Christ.

“know that a man is not justified by works of the law, but by faith in Jesus Christ. So we, too, have believed in Christ Jesus, that we may be justified by faith in Christ and not by works of the law, because by works of the law no one will be justified.”— Galatians 2:16 (BSB)