How do we know Christ's death was part of God's plan?

Revelation 13:8 describes Christ as the Lamb slain from the foundation of the world, indicating that God planned for Christ's sacrifice before time began. This was not a reaction to humanity's fall but an integral part of God's eternal purpose. Peter reinforces this in 1 Peter 1:20, stating that we were redeemed with the precious blood of Christ, foreordained before the foundation of the world. Thus, the sacrificial death of Jesus fulfills God's redemptive plan, assuring believers that their salvation was secured from eternity.