Why is the doctrine of justification by faith crucial in Reformed theology?

In Reformed theology, justification by faith alone is a central tenet, echoing the truths presented in Romans and Galatians. Romans 5:1 states that we have peace with God through our Lord Jesus Christ because we are justified by faith. This doctrine emphasizes that our relationship with God is not based on our merits but solely on Christ's completed work. It counters any notion that human deeds can contribute to salvation, thereby exalting God's grace. By understanding justification as a legal declaration before God, believers can rest assured in their eternal security and the sufficiency of Christ's sacrifice. This profound truth not only brings comfort but also leads to transformative living in response to God's amazing grace.