Faith in Christ matters for salvation as it is the response to His completed work, signifying trust in His faithfulness (Romans 10:9).
In historic Reformed theology, faith is seen as a gift from God, a response prompted by the Holy Spirit to the gospel's call. Romans 10:9 stipulates that if we confess with our mouth that Jesus is Lord and believe in our heart that God raised Him from the dead, we will be saved. Thus, faith itself is not a work that earns salvation; instead, it is the human response to the divine truth of the completed work of Christ—a recognition that salvation is solely based on His faithfulness, not ours. This understanding aligns with the declaration that Jesus is faithful and just, ensuring that our belief stems from His action, not our merit.
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