What does the Bible say about salvation by faith?

In Galatians 3, the Apostle Paul addresses the issue of salvation, emphasizing that it is not obtained through the works of the law, but through faith. He asks the Galatians how they received the Spirit, pointing out that it was 'by the hearing of faith' and not by their own actions. This reinforces the doctrine that salvation is entirely God's work, initiated and completed by Him, without any contribution from the individual. Paul makes it clear that returning to the law for holiness or sanctification diminishes the grace that God provides through Christ and leads believers astray from the true gospel.