Why is trusting in Christ's faithfulness important for salvation?

The assurance of salvation rests upon the faithfulness and completed work of Christ rather than any measure of human ability or righteousness. As articulated in Galatians 2:16, believers are justified not by the works of the law, but through faith in Jesus Christ. This belief underscores that our standing before God is secure, not due to fluctuating feelings or performance but based on the steadfast nature of Christ’s obedience. Such trust enables believers to find rest and confidence in their salvation, as God's promises are irrevocable and anchored in His character.