How does Christ's sacrifice relate to the assurance of salvation?

The assurance of salvation is grounded in the efficacy of Christ's sacrifice. He died not just for a general group but specifically for His elect, effectively atoning for their sins (2 Corinthians 5:21). The blood of Christ isn't a mere possibility for redemption; it actualizes that salvation for those covered by it. This means that all who are in Christ are justified and will ultimately be glorified. Hence, the understanding that Christ died specifically for His people gives believers confidence in their salvation, affirming that His work on the cross accomplishes its intended purpose without failure.