How do we know Jesus' sacrifice is effective for our salvation?

The effectiveness of Jesus' sacrifice is rooted in the principle of divine justice and atonement. When Christ died on the cross, He bore the weight of our sins, fulfilling the penalty required by God for sinfulness, as professed in Isaiah 53. This satisfaction of justice is what makes His sacrifice valid for the redemption of the elect. Furthermore, the resurrection of Christ confirms that His sacrifice was accepted by God, proving that He triumphed over sin and death. Therefore, we can confidently assert that those who trust in Him have their sins removed, as He has taken the punishment that was rightfully ours. Romans 3:25 states that God presented Christ as a sacrifice of atonement through the shedding of His blood—to be received by faith. This illustrates that salvation is not based on our works but on the completed work of Christ.