How do we know Christ's death accomplished salvation?

Christ's death is not merely a tragic event but a purposeful act that accomplished the redemptive work as foreordained by God. The Scripture proclaims that His death was an appointment made before the foundation of the world, ensuring that He would die for His people (Acts 2:23). The purpose of His death was clearly stated in Luke 18:31-33, where it emphasizes that He must fulfill everything written by the prophets concerning Him. Thus, rather than being a defeat, His crucifixion is heralded as an accomplished act of salvation. This aligns with the understanding that, by His death, Christ paid the penalty for sin, securing redemption for His elect.