How do we know Jesus' death was effective for our salvation?

The effectiveness of Jesus' death for salvation is rooted in His role as our high priest who offered Himself as a perfect sacrifice. According to the sermon, Christ's death not only atoned for the sins of His people but also resulted in their justification before God. Paul underscores this truth in Romans 4:25, stating that Christ was delivered for our offenses and raised for our justification, reaffirming that through faith in His blood, all who believe are justified freely by God's grace. This indicates that His sacrificial death and resurrection are essential for our reconciliation to God and the cleansing of our sins.