Why is it important for Christians to have faith in Christ for salvation?

The importance of faith in Christ lies in its role as the instrument through which God's grace is applied to individuals. Romans 10:9 states that if one confesses with their mouth the Lord Jesus and believes in their heart that God raised Him from the dead, they shall be saved. This confession signifies allegiance to Christ's person and work. Justification is not based on our works but through faith in Jesus, who fulfilled the law and bore the punishment for our sins. Therefore, faith is central to the salvation process, confirming that Christ is the end of the law for righteousness.