How do we know that Christ's sacrifice was effective for our salvation?

The sacrifice of Christ is central to His role as our Redeemer. Hebrews 9:12 emphasizes that He entered the holy place with His own blood, obtaining eternal redemption for us. The resurrection serves as a divine seal of His sacrifice, confirming that He has conquered death and sin. This triumph over death is articulated in 1 Corinthians 15:55-57, where the Apostle Paul proclaims victory through Jesus Christ, assuring believers that they are justified and redeemed through His finished work on the cross.