Why is it important for Christians to trust in Christ alone for assurance of salvation?

For Christians, trusting in Christ alone for assurance of salvation is critical because it removes reliance on self-righteousness and places faith firmly in our sinless Savior, who accomplished perfect righteousness on our behalf. As highlighted in Hebrews 12:2, Jesus is the author and finisher of our faith, meaning that our assurance is anchored in His completed work and ongoing intercession. This trust also acknowledges that it is through Christ's sacrificial death, as stated in Romans 8:32, that we are justified before God. Reliance on any other source, including personal endeavors or feelings, leads to uncertainty, whereas faith in Christ guarantees a steadfast hope.