Why is the concept of faith alone important for Christians?

The doctrine of salvation by faith alone, emphasized in Romans 1:17, is foundational for Christians because it reinforces that our acceptance before God is not based on our achievements but solely on the perfect righteousness of Christ. This principle liberates believers from the burden of trying to earn God's favor through works. It assures us that faith itself is a gift from God, as seen in Philippians 1:30, which says that our faith is granted to us. Therefore, it invites a heartfelt response where obedience stems from love and gratitude rather than obligation to the law.