How do we know Christ is revealed in the Old Testament?

Throughout the Old Testament, there are numerous typological foreshadowings of Christ. For instance, the brazen serpent symbolizes Christ's redemptive work, as noted in John 3:14-15, where Jesus likens His crucifixion to Moses lifting the serpent in the wilderness. Similarly, the Passover lamb in Exodus 12, whose blood marked the households of Israel for deliverance from death, points directly to Christ’s sacrificial death for His people. This understanding enhances the richness of Scripture and reveals the continuity of God's redemptive plan from Genesis to Revelation.