How do we know that Jesus' sacrifice on the cross is sufficient for salvation?

In John 19:18, we see Jesus crucified for our sins, fulfilling the prophecies and serving as the perfect sacrificial Lamb. His crucifixion was not just a historical event but the pivotal moment for redemption, as stated in 2 Corinthians 5:21, where He became sin for us, making us righteous before God. Moreover, the resurrection is a powerful testament that His sacrifice was accepted, providing assurance that all who believe in Him have eternal life. His bloodshed not only expiates our guilt but also reconciles us to God.